@BarrenFieldofFucks
Until the embryo/foetus is a sentient, pain feeling being...
Since you associate sentience with feeling pain, you might be interested to know that fetal surgeons administer Anesthesia to the fetus from as early as 15weeks of age, most by 18 weeks and all by 20 weeks because the fetus can feel pain?
Sources
Adzick NS, Prospects for fetal surgery, Early Human Development 89, 881, 2013.
Mayorga-Buiza MJ et al., Management of fetal pain during invasive fetal procedures. Lessons learned from a sentinel event, European Journal of Anaesthesiology 31, 88, 2014.
Brusseau R and Bulich LA, Anesthesia for fetal intervention, in Essential Clinical Anesthesia, Charles Vacanti, Pankaj Sikka, Richard Urman, Mark Dershwitz, B. Scott Segal, Eds., Cambridge University Press, NY; July 2011; 772-776.
Sekulic S et al., Appearance of fetal pain could be associated with maturation of the mesodiencephalic structures. J Pain Res. 9, 1031, 2016
Adzick NS et al., A Randomized Trial of Prenatal versus Postnatal Repair of Myelomeningocele, N Engl J Med 364, 993, 2011 (from the Informed Consent section of the supplementary Protocol to the paper).