And women who got less than five hours of sleep increased their odds of developing preeclampsia -- a serious pregnancy complication related to high blood pressure -- more than ninefold.
Incidence of delivery complications was recorded, including Cesarean delivery, preterm birth, preeclampsia, stillbirth and maternal death, and length of hospital stay was also assessed.
Risks associated with childbearing over the age of 50 include an increased incidence of gestational diabetes, hypertension, delivery by caesarean section, miscarriage, preeclampsia, and placenta previa.
