Studies in prolonged pregnancy
Studies in prolonged pregnancy is a scholarly work, published in 1969 in ''American Journal of Obstetrics and Gynecology''. The main subjects of the publication include gynaecology, medicine, human pregnancy, prospective cohort study, incidence, gestation, assisted reproductive technology, ectopic pregnancy, obstetrics, and vaginal bleeding. Prolonged pregnancy was found to have a significant correlation with maternal age and race and with vaginal bleeding during the first 13 weeks of pregnancy.