Person-environment interaction as a determinant of labor length variables.
D001007:Anxiety; D036861:Delivery, Obstetric; D005260:Female; D006700:Home Childbirth; D006760:Hospitalization; D006801:Humans; D007743:Labor, Obstetric / Q000523:psychology*; D011247:Pregnancy; D011446:Prospective Studies; D012931:Social Environment; D013997:Time Factors