Immigration--a new social factor in obstetrics.
D001724:Birth Weight; D001942:Breast Feeding; D036861:Delivery, Obstetric; D004641:Emigration and Immigration; D005260:Female; D005313:Fetal Death; D006801:Humans; D007231:Infant, Newborn; D007743:Labor, Obstetric; D008131:London; D009774:Obstetrics; D011247:Pregnancy; D011248:Pregnancy Complications; D012924:Social Conditions