Large and small maternity units.
D036861:Delivery, Obstetric; D004739:England; D005260:Female; D006742:Hospital Bed Capacity; D006757:Hospital Units; D006801:Humans; D007743:Labor, Obstetric; D008427:Maternal Health Services; D009775:Obstetrics and Gynecology Department, Hospital / Q000458:organization & administration; D011247:Pregnancy