1. Relaxin in human pregnancy serum measured with an homologous radioimmunoassay;Bell;Obstet Gynecol,1987
2. Radioimmunoassay of relaxin in pregnancy with an analogue of human relaxin;Eddie;Lancet,1986
3. Ripening of the human cervix and induction of labor with intracervical purified porcine relaxin;MacLennan;Obstet Gynecol,1986
4. National Perinatal Statistics Unit,1987
5. Consultative Council on Obstetric and Paediatric Mortality and Morbidity,1985