placenta - isometric view 3d

fertilization implantation facilitating circulations insemination reproduction endometrial endometrium procreation developing blastocyst physically physiology gynecology semination ultrasound isometric temporary embryonic important endocrine producing pregnancy umbilical fallopian fertility placenta critical nutrient exchange separate maternal hormones regulate decidual zygocyte syncytin shortly mammals hormone ovarian abdomen fertile begins uterus cervix female oocyte later fetal organ plays roles waste fetus child birth human blood view cord womb neck tube ovum stem