List of multiple births List of youngest birth fathers Mother Precocious puberty Pregnancy Teenage pregnancy. A girl age 10 gave birth six weeks premature to twin girls, both weighing 3. She became pregnant in December , shortly after her ninth birthday. A young girl in Abbeville, South Carolina , gave birth by cesarean section. Wanwisa Janmuk, married at 8, gave birth to a girl when she was 9 at a hospital in Phetchabun. A year-old gave birth to a baby weighing 3. A young girl, born on March 5, , began menstruating at age 8.