The Fetal Development month by month

Fetal Development Month 1 (weeks 1 through 4) Conception, fertilization, implantation and cleavage.Between days 7-10 from fertilization implantation usually occurs.The amniotic sac, umbilical cord and yolk sac are already beginning to form.By the end of this  month embryo is approximately 2mm long. The yolk sac is a membranous sac attached to an embryo, formed by … Read more

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