Okay, and why do you think it isn't right?
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Decriminalization - Cannabis During Pregnancy
- Thread starter Sleeppy
- Start date
psychoslice
Veteran Member
Fact my bum, its just simply not right to smoke that crap while pregnant, that's a fact.
There needs to be a clarification here, I think. The study shows the short term health benefits, this is a fact that is drawn from the study. That is a logical argument.
You are arguing it is not the correct thing to do, regardless. That is a moral argument. These are two different discussions.
psychoslice
Veteran Member
I cannot believe how ignorant some people are, what else do you believe a pregnant woman should have while pregnant, cigarettes, gorge, I wouldn't even wast my time proving to you anything, because it would be just a wast of time.
psychoslice
Veteran Member
So you simply believe anything your told, no matter where it comes from lol.
Not what I said. But this particular conclusion comes with a study and scientific results! What a bargain!
No one is arguing for any of those things.
psychoslice
Veteran Member
Is it safe to smoke marijuana during pregnancy?
Gerald Briggs
pharmacist clinical specialist
No. Smoking marijuana during pregnancy may affect your baby's growth and the development of his nervous system. Studies have shown that children who were exposed to marijuana during pregnancy sometimes have problems focusing their attention and solving problems.
Children of heavy pot users may also have problems with short-term memory, concentration, and judgment. (There's no evidence so far, however, that marijuana use during pregnancy causes attention deficit hyperactivity disorder).
One study even found that young children whose mothers smoked marijuana during pregnancy had a higher risk of leukemia than those whose mothers did not.
What's more, there's no way to know if the pot you're smoking has been laced with other drugs (such as PCP) or contaminated with pesticides, which would put your baby at even higher risk. And using marijuana increases the chance that your baby will have birth defects if you're also drinking alcohol or smoking tobacco.
If you smoked pot before you realized you were pregnant, don't panic. The chance that your baby has been affected is very small. Still, it's important to be honest with your practitioner about your previous use of pot and other recreational drugs. She may want to run some extra tests to be sure your baby is developing normally.
Gerald Briggs
pharmacist clinical specialist
No. Smoking marijuana during pregnancy may affect your baby's growth and the development of his nervous system. Studies have shown that children who were exposed to marijuana during pregnancy sometimes have problems focusing their attention and solving problems.
Children of heavy pot users may also have problems with short-term memory, concentration, and judgment. (There's no evidence so far, however, that marijuana use during pregnancy causes attention deficit hyperactivity disorder).
One study even found that young children whose mothers smoked marijuana during pregnancy had a higher risk of leukemia than those whose mothers did not.
What's more, there's no way to know if the pot you're smoking has been laced with other drugs (such as PCP) or contaminated with pesticides, which would put your baby at even higher risk. And using marijuana increases the chance that your baby will have birth defects if you're also drinking alcohol or smoking tobacco.
If you smoked pot before you realized you were pregnant, don't panic. The chance that your baby has been affected is very small. Still, it's important to be honest with your practitioner about your previous use of pot and other recreational drugs. She may want to run some extra tests to be sure your baby is developing normally.
psychoslice
Veteran Member
Can marijuana use affect pregnancy? THC (delta-9-hydrocannabinol), the psychoactive ingredient in marijuana, is known to pass from the mother to the developing fetus through the placenta. This means that the fetus is affected by any amount of marijuana taken by the pregnant woman, placing it at a greater risk of complications occurring. The effect of the passive inhalation of marijuana as a result of breathing in the smoke of others is not quantified, but should be avoided. Any form of smoking can disrupt the supply of oxygen and nutrients to the fetus, which can result in restrictions in the growth of the fetus (including overall length, foot length, head size and body weight), and in rare cases premature birth, miscarriage and stillbirth. - See more at: Learn About Marijuana: Factsheets: Reproduction and Pregnancy
psychoslice
Veteran Member
Human studies have shown that some babies born to women who used marijuana during their pregnancies respond differently to visual stimuli, tremble more, and have a high-pitched cry, which could indicate problems with neurological development.55,56 In school, children prenatally exposed to marijuana are more likely to show gaps in problem-solving skills, memory, and the ability to remain attentive.57,58 More research is needed, however, to disentangle marijuana’s specific effects from other environmental factors, including maternal nutrition, exposure to nurturing/neglect, and use of other substances by mothers.59 Establishing marijuana’s effects on prenatal development is important, because roughly half of U.S. pregnancies are unplanned, with the rate considerably higher for teens and young adults,60 so many women may use marijuana without knowing they are pregnant.
My critique of his article is that he says "Studies have shown..." but then doesn't link to the studies. Unless I missed it.Is it safe to smoke marijuana during pregnancy?
Gerald Briggs
pharmacist clinical specialist
No. Smoking marijuana during pregnancy may affect your baby's growth and the development of his nervous system. Studies have shown that children who were exposed to marijuana during pregnancy sometimes have problems focusing their attention and solving problems.
Children of heavy pot users may also have problems with short-term memory, concentration, and judgment. (There's no evidence so far, however, that marijuana use during pregnancy causes attention deficit hyperactivity disorder).
One study even found that young children whose mothers smoked marijuana during pregnancy had a higher risk of leukemia than those whose mothers did not.
What's more, there's no way to know if the pot you're smoking has been laced with other drugs (such as PCP) or contaminated with pesticides, which would put your baby at even higher risk. And using marijuana increases the chance that your baby will have birth defects if you're also drinking alcohol or smoking tobacco.
If you smoked pot before you realized you were pregnant, don't panic. The chance that your baby has been affected is very small. Still, it's important to be honest with your practitioner about your previous use of pot and other recreational drugs. She may want to run some extra tests to be sure your baby is developing normally.
psychoslice
Veteran Member
I'm not going to argue with you, there is much out there showing the dangers of smoke pot while pregnant, my god they even thought that smoking cigarettes was good for you at one stag, would you smoke cigarettes while pregnant ? lol.
Not at all. If there are conflicting studies, they should be brought into the discussion (like you did above). This OP is just one study and should be critiqued as such.
psychoslice
Veteran Member
I think the only ones who would believe you are the very ones who love their pot lol.
I would like to ask two favors, if you don't mind.
- Actually read my posts.
- This is not an "us vs them" type of discussion, at least, not with me. Don't assume that every post I make in regards to your posts is against you. In fact, I agreed with you in my most recent post.
psychoslice
Veteran Member
Well you should have said that earlier, I don't like reading someone's whole thread, it can be boring lol.
Shadow Wolf
Certified People sTabber & Business Owner
You seem to have a habit of insisting scientific studies aren't correct when you disagree with them.
While that is true, that risk is extremely over-hyped. And, of course today with many states having medical marijuana sold at licensed dispensaries, which brings that risk to zero.
psychoslice
Veteran Member
My god there is thousands of papers on how bad pot is for pregnant women, you must be blind. and even if the risk is minimum, would anyone with a brain do it ?.
Shadow Wolf
Certified People sTabber & Business Owner
Thousands, huh?
There is also a bunch that say it's not bad, and even beneficial.
There is a ton of research that has been poorly done, such as the test involving the monkeys who smoked pot, except, they were essentially gassed to death and died from oxygen deprivation and that fact wasn't discovered for some time.
Because it's incredibly rare for that to happen, and you definitely want to kinda get to know someone before accepting an illegal substance from them.
dust1n
Zindīq
Breathe, Push, Puff? Pot Use and Pregnancy: A Review of the Literature
Few issues concerning cannabis and health evoke more disparate opinions than the question of maternal pot use during pregnancy. It's easy to see why. Logic presumes that if pre-natal exposure to intoxicants such as alcohol and tobacco poses proven health risks to the fetus, then exposure to pot would likely pose similar risks to a child's health and development. Nevertheless, much of the science surrounding this issue says otherwise – though a definitive answer remains elusive.
Reasons for this are two-fold. One, it is virtually impossible for investigators to obtain permission to conduct any type of prospective clinical trial that knowingly exposes pregnant mothers – and their future offspring – to cannabis. Two, because women often face severe legal sanctions (such as the loss of child custody or incarceration) for admitting that they have smoked pot while pregnant, most mothers refuse to divulge such information – even to researchers conducting anonymous surveys years after the fact. Moreover, among the handful of surveys that have been conducted, several fail to adequately control for mothers' use of alcohol, tobacco, or other drugs during the course of their pregnancy.
As a result, much of the published data assessing the extent of maternal pot use and its health implications remains limited to historical texts, studies from non-Western cultures (where the use of cannabis has gained greater social acceptability), and retrospective survey data.
Pot For Morning Sickness?
Historic references regarding the use of therapeutic cannabis for a variety of female medical conditions, including difficult childbirth, date back to the 7th century BC. According to "Cannabis Treatments in Obstetrics and Gynecology: A Historical Review" by Dr. Ethan Russo, various parts of the plant – including cannabis flowers and seeds – were used by Chinese and Persian societies to induce contractions, prevent miscarriages, and reduce incidences of post-partum hemorrhage. By the mid-19th century, the use of cannabis tinctures became prevalent in Western cultures to hasten pregnancy and reduce pre-partum nausea. The historical use of cannabis use for pregnancy-associated pain and other complications is also referenced in African, Indian, and Southeast Asian cultures.
More recent documentation of the therapeutic use of cannabis by mothers-to-be is less prevalent – no doubt because of pot's outlaw status in most parts of the world. Nevertheless, some notable references stand out in the modern literature.
Writing in the journal Pediatrics in 1994, Dr. Melanie Dreher and colleagues reported that the use of cannabis to treat nausea and increase appetite during pregnancy remains customary among women in southeast Jamaica. Though Dreher acknowledges that such use is discouraged at government-sponsored pre-natal clinics, she found that many women nonetheless consider ganja to hold therapeutic benefits to themselves and their unborn children.
More recently, Dr. Wei-Ni Lin Curry published a first-person account documenting her own use of therapeutic cannabis to alleviate symptoms of hyperemesis gravidarum (HG), a potentially life-threatening condition characterized by severe nausea and vomiting, malnutrition, and weight loss during pregnancy. (While general nausea and vomiting, colloquially known as 'morning sickness,' is experienced by an estimate 70 to 80 percent of all expectant mothers, approximately 1 to 2 percent are struck with the persistent vomiting and wasting associated with HG.) Curry recounts:
"Within two weeks of my daughter's conception, I became desperately nauseated and vomited throughout the day and night. ... I vomited bile of every shade, and soon began retching up blood. ... I felt so helpless and distraught that I went to the abortion clinic twice, but both times I left without going through the with procedure. ... Finally I decide to try medical cannabis. ... Just one to two little puffs at night, and if I needed in the morning, resulted in an entire day of wellness. I went from not eating, not drinking, not functioning, and continually vomiting and bleeding from two orifices to being completely cured. ... Not only did the cannabis save my [life] during the duration of my hyperemesis, it saved the life of the child within my womb."
Most recently, survey data collected by the directors of the Vancouver Island Compassion Society (The VICS) and the BC Compassion Club and published in the journal Complementary Therapies in Clinical Practice reported that cannabis is therapeutic in the treatment of both morning sickness and HG. Of the 84 women who responded to the anonymous questionnaire, 36 said that they had used cannabis intermittently during their pregnancy to treat symptoms of vomiting, nausea, and appetite loss. Of these, 92 percent said that cannabis was "extremely effective" or "effective" in combating their symptoms. Investigators noted that although most women chose to self-administer cannabis by smoking, many (31 percent) also reported consuming hempen edibles, and eight percent reported using cannabis-based oils or tinctures.
Pre-Natal Pot Exposure and Child Development
Though several retrospective, self-report surveys have been conducted regarding pre-natal exposure to cannabis, not all of these properly control for the use of alcohol or other substances. Among those that do, most report cannabis' apparent impact on birth-weight and other adverse perinatal outcomes to be minimal. (Though adverse reproductive outcomes have been reported in rodents given synthetic THC, these results are typically only reported after the administration of extremely large doses of the drug at specific times during pregnancy. Therefore, these results likely have little relevance to humans.)
Writing in their 1997 book Marijuana Myths, Marijuana Facts: A Review of the Scientific Evidence (The Lindesmith Center), Drs. John P. Morgan and Lynn Zimmer assert, "Marijuana has no reliable impact on birth size, length of gestation ... or the occurrence of physical abnormalities" among infants. Large-scale surveys appear to back up their conclusion.
A 2002 survey of 12,060 British women did not demonstrate significant differences in growth among newborns exposed to cannabis in utero versus those with no exposure, when controlling for co-founding factors such as the mothers' age, pre-pregnancy weight, and the self-reported use of tobacco, alcohol, caffeine, and other illicit drugs. A 1999 survey of 12,885 Dutch mothers reported similar findings after controlling for maternal tobacco use. "The use of cannabis is not a major prognostic factor regarding the outcome of pregnancy," the authors concluded. A 1997 Australian study of 32,483 mothers also reported, "There is inadequate evidence that cannabis, at the amount typically consumed by pregnant women, causes low birth weight." Most recently, a large-scale case-control study published in the journal Pediatric and Perinatal Epidemiology determined that mothers who reported using cannabis during pregnancy suffered no increased risk of bearing children with acute myeloid leukemia, a cancer known to strike adolescents under age 15.
Arguably the study most often cited on the subject remains Dr. Dreher's work from Jamaica, which examined the birth weights and early development of babies exposed to cannabis compared to non-exposed infants. (Mothers in the study reported that they occasionally mixed cannabis with tea as an alternative to smoking.) Her study reported no significant physical or psychological differences in newborns of heavy marijuana-using mothers at three days old, and found that exposed children performed better on a variety of physiological and autonomic tests than non-exposed children at 30 days. (This latter trend was suggested to have been a result of the socio-economic status of the mothers rather than a result of pre-natal pot exposure.)
By contrast, longitudinal data assessing the potential impact of pre-natal cannabis exposure on neurobehavioral and cognitive functioning is ambivalent. Two cohorts have examined this issue, both of which assessed the impact of heavy marijuana exposure on offspring outcome. Both studies remain ongoing.
The first cohort, known as the Maternal Health Practices and Child Development Study, examines the offspring of so-called "high-risk" mothers of low socio-economic status who reported using pot, alcohol, and other intoxicants. Investigators report an association between daily cannabis use in the first and third trimesters and adverse neurobehavioral and cognitive outcomes, such as lower verbal and reading scores and increased depression. However, due to the study's methodological limitations, researchers cannot conclude whether these outcomes are due to cannabis exposure or other pre-natal or post-natal environmental factors.
The second cohort, known as the Ottawa Prenatal Prospective Study (OPPS) examines the outcomes of prenatal exposure to cannabis and tobacco smoking in a sample of low-risk, white, upper-class families in Ontario, Canada. So far, results of the study have been mixed – showing an association between maternal pot use and higher incidences of adolescent impulsivity, overall poor behavior, and decreased "executive function" (an integration of cognitive processes) at certain ages, but not at others. (By contrast, investigators have not noted any negative association between pre-natal pot exposure and IQ scores.) Recently, a comprehensive review of both studies published in the journal Neuroscience and Behavioral in 2005 concluded that if an association between pre-natal cannabis exposure and certain neurobehavioral and cognitive deficits exists, it is a "subtle" one and appears to be primarily associated with children exposed to heavy amounts of cannabis as well as alcohol and/or tobacco.
More recently, researchers at the University of Pittsburgh School of Medicine published findings in 2008 from a prospective study assessing the effects of prenatal marijuana exposure in 648 children in a low-income population at a six-year follow up. Researchers reported: "There was a significant nonlinear relationship between marijuana exposure and child intelligence. Heavy marijuana use (one or more cigarettes per day) during the first trimester was associated with lower verbal reasoning. ... Heavy use during the second trimester predicted deficits in the composite, short-term memory, and quantitative scores. Third-trimester heavy use was negatively associated with the quantitatives core. ... These findings are of concern, but they do not by themselves demonstrate causality."
Most recently in 2009 investigators at the University of Bristol in Great Britain assessed whether maternal use of tobacco, alcohol, or cannabis during pregnancy increased the risk of psychotic symptoms in their offspring. Researchers examined the drug use habits of the mothers of over 6,300 adolescents - approximately 12 percent of which exhibited some symptoms of psychosis.
Authors concluded: "Frequency of maternal tobacco use during pregnancy was associated with increased risk of suspect or definite psychotic symptoms (in offspring.) Maternal alcohol use shows a non-linear association with psychotic symptoms, with this effect almost exclusively in the offspring of women drinking >21 units (approximately a half-pint of beer or a glass of wine) weekly. Maternal cannabis was not associated with psychotic symptoms."
The Occasional Toke: Safe for Moms or Not?
Unfortunately, there is not a definitive answer to this question available at this time. Nevertheless, with a reported three percent of US women of reproductive age reporting that they occasionally use marijuana, it may be arguable that potential pre-natal and post-natal dangers posed by maternal pot use – particularly moderate use – are rather minimal, especially when compared to the in utero exposure of alcohol and tobacco. Ultimately however, any decision by the parent regarding the maternal use of cannabis should be made in consultation with a physician. In addition, any decision to potentially use cannabis carries with it serious potential legal ramifications, including temporary loss of child custody.
Finally, it should be noted that scientists today are just now beginning to understand the role of endocannabinoids and the endocannabinoid system in reproduction, including their role in pre-natal and post-natal development. Whether the future understanding of this system will shed additional light on the health implications of maternal pot smoking remains to be seen. Regardless, let's hope that it is science -- not rhetoric -- that ultimately is the final arbiter in this decades-long debate.
Few issues concerning cannabis and health evoke more disparate opinions than the question of maternal pot use during pregnancy. It's easy to see why. Logic presumes that if pre-natal exposure to intoxicants such as alcohol and tobacco poses proven health risks to the fetus, then exposure to pot would likely pose similar risks to a child's health and development. Nevertheless, much of the science surrounding this issue says otherwise – though a definitive answer remains elusive.
Reasons for this are two-fold. One, it is virtually impossible for investigators to obtain permission to conduct any type of prospective clinical trial that knowingly exposes pregnant mothers – and their future offspring – to cannabis. Two, because women often face severe legal sanctions (such as the loss of child custody or incarceration) for admitting that they have smoked pot while pregnant, most mothers refuse to divulge such information – even to researchers conducting anonymous surveys years after the fact. Moreover, among the handful of surveys that have been conducted, several fail to adequately control for mothers' use of alcohol, tobacco, or other drugs during the course of their pregnancy.
As a result, much of the published data assessing the extent of maternal pot use and its health implications remains limited to historical texts, studies from non-Western cultures (where the use of cannabis has gained greater social acceptability), and retrospective survey data.
Pot For Morning Sickness?
Historic references regarding the use of therapeutic cannabis for a variety of female medical conditions, including difficult childbirth, date back to the 7th century BC. According to "Cannabis Treatments in Obstetrics and Gynecology: A Historical Review" by Dr. Ethan Russo, various parts of the plant – including cannabis flowers and seeds – were used by Chinese and Persian societies to induce contractions, prevent miscarriages, and reduce incidences of post-partum hemorrhage. By the mid-19th century, the use of cannabis tinctures became prevalent in Western cultures to hasten pregnancy and reduce pre-partum nausea. The historical use of cannabis use for pregnancy-associated pain and other complications is also referenced in African, Indian, and Southeast Asian cultures.
More recent documentation of the therapeutic use of cannabis by mothers-to-be is less prevalent – no doubt because of pot's outlaw status in most parts of the world. Nevertheless, some notable references stand out in the modern literature.
Writing in the journal Pediatrics in 1994, Dr. Melanie Dreher and colleagues reported that the use of cannabis to treat nausea and increase appetite during pregnancy remains customary among women in southeast Jamaica. Though Dreher acknowledges that such use is discouraged at government-sponsored pre-natal clinics, she found that many women nonetheless consider ganja to hold therapeutic benefits to themselves and their unborn children.
More recently, Dr. Wei-Ni Lin Curry published a first-person account documenting her own use of therapeutic cannabis to alleviate symptoms of hyperemesis gravidarum (HG), a potentially life-threatening condition characterized by severe nausea and vomiting, malnutrition, and weight loss during pregnancy. (While general nausea and vomiting, colloquially known as 'morning sickness,' is experienced by an estimate 70 to 80 percent of all expectant mothers, approximately 1 to 2 percent are struck with the persistent vomiting and wasting associated with HG.) Curry recounts:
"Within two weeks of my daughter's conception, I became desperately nauseated and vomited throughout the day and night. ... I vomited bile of every shade, and soon began retching up blood. ... I felt so helpless and distraught that I went to the abortion clinic twice, but both times I left without going through the with procedure. ... Finally I decide to try medical cannabis. ... Just one to two little puffs at night, and if I needed in the morning, resulted in an entire day of wellness. I went from not eating, not drinking, not functioning, and continually vomiting and bleeding from two orifices to being completely cured. ... Not only did the cannabis save my [life] during the duration of my hyperemesis, it saved the life of the child within my womb."
Most recently, survey data collected by the directors of the Vancouver Island Compassion Society (The VICS) and the BC Compassion Club and published in the journal Complementary Therapies in Clinical Practice reported that cannabis is therapeutic in the treatment of both morning sickness and HG. Of the 84 women who responded to the anonymous questionnaire, 36 said that they had used cannabis intermittently during their pregnancy to treat symptoms of vomiting, nausea, and appetite loss. Of these, 92 percent said that cannabis was "extremely effective" or "effective" in combating their symptoms. Investigators noted that although most women chose to self-administer cannabis by smoking, many (31 percent) also reported consuming hempen edibles, and eight percent reported using cannabis-based oils or tinctures.
Pre-Natal Pot Exposure and Child Development
Though several retrospective, self-report surveys have been conducted regarding pre-natal exposure to cannabis, not all of these properly control for the use of alcohol or other substances. Among those that do, most report cannabis' apparent impact on birth-weight and other adverse perinatal outcomes to be minimal. (Though adverse reproductive outcomes have been reported in rodents given synthetic THC, these results are typically only reported after the administration of extremely large doses of the drug at specific times during pregnancy. Therefore, these results likely have little relevance to humans.)
Writing in their 1997 book Marijuana Myths, Marijuana Facts: A Review of the Scientific Evidence (The Lindesmith Center), Drs. John P. Morgan and Lynn Zimmer assert, "Marijuana has no reliable impact on birth size, length of gestation ... or the occurrence of physical abnormalities" among infants. Large-scale surveys appear to back up their conclusion.
A 2002 survey of 12,060 British women did not demonstrate significant differences in growth among newborns exposed to cannabis in utero versus those with no exposure, when controlling for co-founding factors such as the mothers' age, pre-pregnancy weight, and the self-reported use of tobacco, alcohol, caffeine, and other illicit drugs. A 1999 survey of 12,885 Dutch mothers reported similar findings after controlling for maternal tobacco use. "The use of cannabis is not a major prognostic factor regarding the outcome of pregnancy," the authors concluded. A 1997 Australian study of 32,483 mothers also reported, "There is inadequate evidence that cannabis, at the amount typically consumed by pregnant women, causes low birth weight." Most recently, a large-scale case-control study published in the journal Pediatric and Perinatal Epidemiology determined that mothers who reported using cannabis during pregnancy suffered no increased risk of bearing children with acute myeloid leukemia, a cancer known to strike adolescents under age 15.
Arguably the study most often cited on the subject remains Dr. Dreher's work from Jamaica, which examined the birth weights and early development of babies exposed to cannabis compared to non-exposed infants. (Mothers in the study reported that they occasionally mixed cannabis with tea as an alternative to smoking.) Her study reported no significant physical or psychological differences in newborns of heavy marijuana-using mothers at three days old, and found that exposed children performed better on a variety of physiological and autonomic tests than non-exposed children at 30 days. (This latter trend was suggested to have been a result of the socio-economic status of the mothers rather than a result of pre-natal pot exposure.)
By contrast, longitudinal data assessing the potential impact of pre-natal cannabis exposure on neurobehavioral and cognitive functioning is ambivalent. Two cohorts have examined this issue, both of which assessed the impact of heavy marijuana exposure on offspring outcome. Both studies remain ongoing.
The first cohort, known as the Maternal Health Practices and Child Development Study, examines the offspring of so-called "high-risk" mothers of low socio-economic status who reported using pot, alcohol, and other intoxicants. Investigators report an association between daily cannabis use in the first and third trimesters and adverse neurobehavioral and cognitive outcomes, such as lower verbal and reading scores and increased depression. However, due to the study's methodological limitations, researchers cannot conclude whether these outcomes are due to cannabis exposure or other pre-natal or post-natal environmental factors.
The second cohort, known as the Ottawa Prenatal Prospective Study (OPPS) examines the outcomes of prenatal exposure to cannabis and tobacco smoking in a sample of low-risk, white, upper-class families in Ontario, Canada. So far, results of the study have been mixed – showing an association between maternal pot use and higher incidences of adolescent impulsivity, overall poor behavior, and decreased "executive function" (an integration of cognitive processes) at certain ages, but not at others. (By contrast, investigators have not noted any negative association between pre-natal pot exposure and IQ scores.) Recently, a comprehensive review of both studies published in the journal Neuroscience and Behavioral in 2005 concluded that if an association between pre-natal cannabis exposure and certain neurobehavioral and cognitive deficits exists, it is a "subtle" one and appears to be primarily associated with children exposed to heavy amounts of cannabis as well as alcohol and/or tobacco.
More recently, researchers at the University of Pittsburgh School of Medicine published findings in 2008 from a prospective study assessing the effects of prenatal marijuana exposure in 648 children in a low-income population at a six-year follow up. Researchers reported: "There was a significant nonlinear relationship between marijuana exposure and child intelligence. Heavy marijuana use (one or more cigarettes per day) during the first trimester was associated with lower verbal reasoning. ... Heavy use during the second trimester predicted deficits in the composite, short-term memory, and quantitative scores. Third-trimester heavy use was negatively associated with the quantitatives core. ... These findings are of concern, but they do not by themselves demonstrate causality."
Most recently in 2009 investigators at the University of Bristol in Great Britain assessed whether maternal use of tobacco, alcohol, or cannabis during pregnancy increased the risk of psychotic symptoms in their offspring. Researchers examined the drug use habits of the mothers of over 6,300 adolescents - approximately 12 percent of which exhibited some symptoms of psychosis.
Authors concluded: "Frequency of maternal tobacco use during pregnancy was associated with increased risk of suspect or definite psychotic symptoms (in offspring.) Maternal alcohol use shows a non-linear association with psychotic symptoms, with this effect almost exclusively in the offspring of women drinking >21 units (approximately a half-pint of beer or a glass of wine) weekly. Maternal cannabis was not associated with psychotic symptoms."
The Occasional Toke: Safe for Moms or Not?
Unfortunately, there is not a definitive answer to this question available at this time. Nevertheless, with a reported three percent of US women of reproductive age reporting that they occasionally use marijuana, it may be arguable that potential pre-natal and post-natal dangers posed by maternal pot use – particularly moderate use – are rather minimal, especially when compared to the in utero exposure of alcohol and tobacco. Ultimately however, any decision by the parent regarding the maternal use of cannabis should be made in consultation with a physician. In addition, any decision to potentially use cannabis carries with it serious potential legal ramifications, including temporary loss of child custody.
Finally, it should be noted that scientists today are just now beginning to understand the role of endocannabinoids and the endocannabinoid system in reproduction, including their role in pre-natal and post-natal development. Whether the future understanding of this system will shed additional light on the health implications of maternal pot smoking remains to be seen. Regardless, let's hope that it is science -- not rhetoric -- that ultimately is the final arbiter in this decades-long debate.