How would hair care fit in? Personal care products, including lotions, cleansers, makeup, shampoo and nail polish, often contain many chemicals. Past research, she noted, has linked disruptions in pregnancy hormones to an increased risk of problems such as impaired fetal growth, preterm birth and low birth weight. That's a concern because during pregnancy, levels of those hormones should rise, said lead researcher Zorimar Rivera-Nunez, an assistant professor at Rutgers School of Public Health in Piscataway, N.J. Researchers found that among more than 1,000 pregnant women they followed, those who used certain hair products - dyes, bleaches, relaxers or mousse - had lower levels of several hormones, including estrogen and progesterone. 17, 2021 (HealthDay News) - Pregnant women who use hair dyes or straighteners may have relatively lower levels of pregnancy-supporting hormones, a recent study suggests.
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