TY - JOUR AU - Bergsjø, P; Denman, D W; Hoffman, H J; Meirik, O TI - Duration Of Human Singleton Pregnancy T2 - A Population-based Study JO - Acta Obstetricia et Gynecologica Scandinavica VL - 69 (3) PY - 1990 DO - 10.3109/00016349009028681 L3 - PubMed-ID: 2220340 SP - 197 EP - 207 ER -