With the soul threads I thought lets take a different approach.
When does one acquire consciousness?
Does a fetus/baby in the womb have any
consciousness?
Consciousness being a sense of awareness, would mean that consciousness is present when awareness is present.
This article says...
Abstract
A simple definition of consciousness is sensory awareness of the body, the self, and the world. The fetus may be aware of the body, for example by perceiving pain. It reacts to touch, smell, and sound, and shows facial expressions responding to external stimuli. However, these reactions are probably preprogrammed and have a subcortical nonconscious origin.
This article says...
...there is now evidence that pain does not require the cortex, subcortical structures are sufficient. These subcortical structures include the brain stem, basal ganglia, amygdala, and the hypothalamic-pituitary axis, all of which may be capable of processing pain-instigated impulses from noxious stimuli several weeks prior to the development of thalamic-cortical connections. Because subcortical processing of pain occurs without conscious intent, these impulses are, by definition, reflexes. However, not all reflexes are the same. Instigating the patellar reflex can amuse grammar school children, triggering subcortical pain processing by noxious stimulation can affect an immature human’s development.
Relying on connections to the cortex for the existence of pain is also refuted by clinical evidence in adults suggesting that neither ablation nor stimulation of the primary somatosensory cortex alters pain perception. Reliance on the cortex for pain is also disproved by infants who are either missing or have minimal cortex (anencephalic and hydranencephalic babies) who have been exposed to painful and consoling stimuli and then respond appropriately. Taken together, the findings of these studies suggest that definitions of pain which hinge on possessing a mature conscious capacity requiring cortical functioning and connectedness, are outdated.
This shows that a fetus is aware quite early - that's consciously, but we haven't even considered consciousness at a subconscious level.
Humans are subconsciously aware, even before becoming consciously aware.
For example, we sense or perceive things. That's an awareness.
No one can honestly and accurately conclude that a baby, during the first trimester, is not subconsciously aware...
We are subconsciously aware all the time, even during sleep. So to argue that a baby is asleep, and thus unconscious is not a strong argument.
Based on this information, the fetus is conscious during the first trimester.
However, this is irrelevant to the question of whether or not the fetus is a life, since consciousness does not determine life.
I know that's not the subject of the OP, but just thought it important to mention.