human fetus placenta anatomy. usual anatomical placenta location during pregnancy.

normal anatomy umbilical cord fetus human midwife pregnancy reproduction structure vein anatomical artery anterior previa woman mother prenatal womb female uterus foetus placental child front locations growth gynecology diagram ultrasound newborn medicine birth development delivery praevia baby placenta illustration vector pregnant vagina entanglement head obstetrics fetal presentation embryo medical pelvic gestation childbirth birthday maternity motherhood infant body marginal partial total