¾ of 109 embryos across 21 mothers is 3.8 embryos per mother. For human miscarriage rates, remember it depends heavily on how far along the pregnancy is: 70

¾ of 109 embryos across 21 mothers is 3.8 embryos per mother. For human miscarriage rates, remember it depends heavily on how far along the pregnancy is: 70% of conceptions lead to miscarriage 50% of implantations lead to miscarriage 30% of aggressively confirmed pregnancies lead to miscarriage 15% of typical confirmed pregnancies lead to miscarriage