Girls May Marry Younger If They Menstruate Early

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The timing of a girl’s first menstruation may affect her first sexual encounter, first pregnancy, and her vulnerability to some sexually transmitted infections, according to a meta-analysis by researchers at Columbia University Mailman School of Public Health. These patterns of sexual and reproductive health outcomes for girls in low- and middle-income countries who menstruated at an early age are similar to what has been observed in high-income countries such as the U.S.  Until now, there was little known about associations between early menarche and sexual and reproductive health outcomes in less advanced economies. The results are published online in the journal PLOS ONE.

“Menstruation marks the beginning of a girl’s reproductive life and is an important indicator of girls’ physical, nutritional, and reproductive health, yet it is often overlooked in public health,” said Marni Sommer, DrPH, MSN, RN, associate professor of Sociomedical Sciences at the Mailman School of Public Health, and senior author. In high-income countries, early menarche is defined as before the age of 12.

The Columbia researchers used data from peer-reviewed studies and health and social sciences databases to assess the link between menarche and various negative sexual and reproductive health outcomes in adolescence. These included early sexual debut, experiences of sexual advances from older men, early pregnancy and childbirth, sexual risk taking, and sexually transmitted infections, including HIV. The researchers also studied the link between age at menarche and early marriage. Two of the studies were conducted in Malawi; the others were conducted in South Africa, Nepal, Jamaica, Nigeria, Zimbabwe, India, and Bangladesh.

Overall, an earlier age at menstruation was associated with an earlier age of sexual initiation, age at pregnancy, and first live birth.

A sample of Jamaican women who menstruated early was 28% more likely to engage in sexual intercourse before the age of 16. In rural Malawi, 55% of those who had their first period before age 14 had sex before the age of 16, compared with 27% of those with menarche at age 14 to 15, and only 4% of those with menarche at age 16 or older. Few girls engaged in sexual intercourse before they began menstruation.

Girls who experienced menarche at an earlier age were also more likely to get married at a young age.  In India, for example, one study suggested that for each year menarche was delayed, the age of marriage increased by nine months.

“Despite possible similarities in the relationship between early menarche and sexual and reproductive health in low-, middle- and high-income countries, the factors associated with early menarche and early marriage may differ across ethnic groups within the same country,” noted Mobolaji Ibitoye, MPH, DrPH candidate in the Department of Sociomedical Sciences at the Mailman School and lead author. “This highlights the need for a greater understanding of the cultural and regional variations in the effect of age at menarche on age at marriage both within and between countries.”

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Studies from several high-income countries have shown that early menarche is also associated with various psychosocial factors including delinquency, substance use, and depression—all of which have sexual and reproductive health implications.

“Although our analysis did not examine these patterns, there is a critical need to assess if similar associations exist in low-and middle-income countries,” said Dr. Sommer. “Ultimately this reinforces the importance of including age of menarche in many more studies.”

(Source: Columbia University, PLOS ONE)

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Date Created: June 17, 2017 Date Modified: July 4, 2017