Teenage pregnancy is pregnancy in human females under the age of 20 at the time that the pregnancy ends. A girl can become pregnant from sexual intercourse after she has began to ovulate which can be before her first menstrual period (menarche), but usually occurs after the onset of her periods. In well-nourished girls, menarche usually takes place around the age of 12 or 13.
Pregnant teenagers face many of the same obstetrics issues as other women. There are, however, additional medical concerns for pregnant girls aged under 15, who are less likely to have become physically developed enough to sustain a healthy pregnancy or to give birth.[2] For mothers aged 15–19, risks are associated more with socioeconomic factors than with the biological effects of age.[3] Risks of low birth weight, premature labor, anemia, and pre-eclampsia are connected to the biological age itself, as it was observed in teen births even after controlling for other risk factors (such as utilization of antenatal care etc.).[4][5] Every day in developing countries, 20,000 girls under age 18 give birth.[6] This amounts to 7.3 million births a year.[6] And if all pregnancies are included, the number of adolescent pregnancies is much higher.