Preschool siblings at birth: short-term effects.
D002652:Child Behavior; D002675:Child, Preschool; D036861:Delivery, Obstetric; D005260:Female; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D007743:Labor, Obstetric; D008297:Male; D010287:Parent-Child Relations; D011247:Pregnancy; D012801:Sibling Relations