BJOG-an International Journal Of Obstetrics And Gynaecology, 120(8), 987-995. Wiley Bjog-an International Journal of Obstetrics and Gynaecology, 120(8), 987-995. Wiley BJOG : an International Journal of Obstetrics and Gynaecology, 120, 8, pp. 987-95 BJOG: An International Journal of Obstetrics and Gynaecology, 120(8), 987-995 BJOG : an International Journal of Obstetrics and Gynaecology, 120, 987-95