preterm birth. placental abrupted and early baby delivery. pregnancy

birth female placenta reproductive fetus educational labor childbirth human newborn infant anatomy fetal pregnancy body mother delivery womb baby medical pregnant vector embryo anatomical poster child premature risk preterm born flat woman neonatal neonatology oxygen placental amniotic placentae intrauterine uterine stillbirth rupture abruption compression bleeding emergency antepartum abrupted early pathology