Medical Birth Registry of Norway, Locus of Registry Based Epidemiology, Institute of Community Medicine and Primary Health Care, University of Bergen and Norwegian Institute of Public Health, Bergen, Norway. Svein.Rasmussen@mfr.uib.no
We assessed whether fetal growth restriction without pregnancy-induced hypertension (PIH) is associated with the different clinical subgroups of PIH in the subsequent pregnancy. We also assessed the maternal and paternal contributions to this effect. Pairs of first and second, second and third, third and fourth, and fourth and fifth births were identified among all of the births in Norway: 137 375 pairs with same mother and father, 18 376 pairs with same mother and different fathers, and 18 916 pairs with same father and different mothers. Second births in each pair were restricted to those that occurred in 1998-2005. Odds ratios to predict early onset, severe, and mild preeclampsia and transient hypertension in the second birth from birth weight