placenta
fertilization zygote divides gastrulation placenta forms
The heart begins beating.
18-22 days 18-22 days
No, gestational diabetes has to do with insulin resistance in the mother, causing an increase of sugar in the blood, causing rapid weight gain in the fetus.
During embryologic development, there are two umbilical veins, left and right, that drain blood from the placenta to the heart. The right umbilical vein regresses and under normal circumstances is completely obliterated during the second month of development. The left umbilical vein persists and delivers blood from the placenta to the developing fetus. The diameter of the intra-abdominal umbilical vein increases linearly, from 3 mm at 15 weeks of gestation to 8 mm at term.
amorous
ectoderm
The heart and the blood vessels that lead to the heart.
heart
The development of the artificial heart has allowed the success rate of heart transplants go up.
Yes.
through your heart and out to the wrest of your body