This is your baby's little, first Home, The amniotic sac! He or she lives inside the amniotic sac, (The thin innermost membranous sac enclosing the developing embryo in intra-uterine life) which is completely closed and filled with amniotic fluid, attached to the umbilical cord and cuddled up next to the placenta. In this perfect little habitation your baby spends their first three trimesters getting nutrients & oxygen from mother's blood, getting ready for the day when he gets to meet you.