1. Delayed Childbearing and the Outcome of Pregnancy
2. Advanced maternal age: The mature gravida
3. Maternal age, obstetric complications, and the outcome of pregnancy;Naeye RL;Obstet Gynecol,1983
4. Pregnancy and delivery In women aged 40 and over;Kajanoja P;Obstet Gynecol,1978
5. Pregnancy after 40 years of age;Spellacy WN;Obstet Gynecol,1986