Pregnant teenagers face many of the same obstetrics issues as other women. There are, however, additional medical concerns for mothers aged under 15.[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.[7] And if all pregnancies are included, the number of adolescent pregnancies is much higher.