Pre-eclampsia and placenta accreta have opposite histological features of placentation.
This study set out to test the hypotheses that the sex ratios in these two pregnancy complications are opposite and that these conditions are mutually exclusive A population-based database covering all deliveries in South Australia between 1986 and 1995 and the hospital-based obstetric database of the Adelaide Women's and Children's Hospital, covering 8549 births between 1993 and 1995, were used to ascertain the sex ratios in singleton pregnancies and the sex ratios in those pregnancies in which there was retained placenta, hypertension in pregnancy, or pre-eclampsia.
The likelihood of independence of occurrence or mutual exclusivity of retained placenta anti hypertension in pregnancy or pre-eclampsia were also examined.
The male : female sex ratio in the South Australian population was 1.077.
In pregnancies with hypertension in pregnancy it was 1.165 (P<0.001) and in pregnancies with retained placenta it was 0.883 (P<0.0001).
There was a trend to an increased sex ratio in pre-eclamptic pregnancy (1.248 in primigravid and 1.092 in multigravid women) but there was insufficient power to detect significance (P=0.207 and 0.470, respectively).
Neither hypertension in pregnancy nor pre-eclampsia were mutually exclusive of placenta accreta : hypertensive disorders of pregnancy and placenta accreta occurred independently of each other. (...)
Mots-clés Pascal : Epidémiologie, Australie, Océanie, Sex ratio, Complication, Prééclampsie, Placenta accreta, Annexe embryonnaire, Gestation pathologie, Toxémie gravidique, Accouchement pathologie, Placenta pathologie, Homme, Femelle
Mots-clés Pascal anglais : Epidemiology, Australia, Oceania, Sex ratio, Complication, Preeclampsia, Placenta accreta, Fetal membrane, Pregnancy disorders, Pregnancy toxemia, Delivery disorders, Placenta diseases, Human, Female
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 99-0037172
Code Inist : 002B20F02. Création : 31/05/1999.