USC geneticist Marlena Fejzo, PhD, who earned international acclaim for identifying the cause of morning sickness and hyperemesis gravidarum, is one of Time magazine’s 2024 “Women of the Year.” She was named along with notable women including, but not limited to, Greta Gerwig, Nobel Laureate Claudia Goldin, Chanel CEO Leena Nair and 2018 Nobel Peace Prize winner Nadia Murad.

The recognition follows Fejzo’s recent study, published in Nature, which showed that a mother’s sensitivity to a hormone produced by the fetus triggers nausea and vomiting during pregnancy. While about 80% of pregnant people experience morning sickness, another 2% develop a severe version called hyperemesis gravidarum, which can cause dehydration, weight loss, electrolyte imbalances and hospitalization.

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