uteroplacental circulation. the structure of the placenta. anatomy of pregnancy. umbilical arteries and vein. placental

physiology gynecology fertilization reproduction vector graphic development medicine artery child fetus illustration baby diagram cord blood pregnant human female uterus fetal education medical organ newborn womb life biology mother embryo anatomical science system placental circulation umbilical arterie vein placenta uteroplacental structure anatomy pregnancy insufficiency hemodynamic disorder accurate detailed