normal placental previa. usual anatomical placenta location during pregnancy.

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