Medical outcomes

Maternal and prenatal health is of particular concern among teens who are pregnant or parenting. The worldwide incidence of premature birth and low birth weight is higher among adolescent mothers. Research indicates that pregnant teens are less likely to receive prenatal care, often seeking it in the third trimester, if at all. The Guttmacher Institute reports that one-third of pregnant teens receive insufficient prenatal care and that their children are more likely to suffer from health issues in childhood or be hospitalized than those born to older women. However, studies have indicated that young mothers who are given high-quality maternity care have significantly healthier babies than those that do not. Many of the health-issues associated with teenage mothers, many of whom do not have health insurance, appear to result from lack of access to high-quality medical care. Many pregnant teens are subject to nutritional deficiencies from poor eating habits common in adolescence, including attempts to lose weight through dieting, skipping meals, food faddism, snacking, and consumption of fast food.

Inadequate nutrition during pregnancy is an even more marked problem among teenagers in developing countries. Complications of pregnancy result in the deaths of an estimated 70,000 teen girls in developing countries each year. Young mothers and their babies are also at greater risk of contracting HIV. The World Health Organization estimates that the risk of death following pregnancy is twice as great for women between 15 and 19 years than for those between the ages of 20 and 24. The maternal mortality rate can be up to five times higher for girls aged between 10 and 14 than for women of about twenty years of age. Illegal abortion also holds many risks for teenage girls in areas such as sub-Saharan Africa
Risks for medical complications are greater for girls 14 years of age and younger, as an underdeveloped pelvis can lead to difficulties in childbirth. Obstructed labour is normally dealt with by Caesarean section in industrialized nations; however, in developing regions where medical services might be unavailable, it can lead to eclampsia, obstetric fistula, infant mortality, or maternal death. For mothers in their late teens, age in itself is not a risk factor, and poor outcomes are associated more with socioeconomic factors rather than with biology.