transplacental transmission of cytomegalovirus to human embryo

human fetal microbe transmission biology science medicine medical illustration herpes placenta congenital fetus 3d baby embryo transplacental aids infection virus etiology fertilization gynecological chickenpox perinatal teratogenic fourth reproduction inside aetiology child embryonic womb anatomy caught foetus hiv childbirth embryology week pregnancy birth prenatal ultrasound examination development uterus rubella pregnant unborn