Scientists Uncover Biological Basis for ‘Pregnancy Brain’ Memory Lapses
New research reveals how elevated estrogen impacts memory during pregnancy, offering insight into common cognitive changes.
POLICY WIRE — City, Country — A recent study has identified a biological explanation for the mental fogginess many women experience during pregnancy, often referred to as ‘pregnancy brain’ or ‘momnesia.’
The condition, characterized by forgetfulness and difficulty recalling information, has been widely reported by expectant mothers who frequently misplace items or lose track of conversations. Scientists have now uncovered a specific neural mechanism that contributes to these cognitive shifts.
Research conducted on mice with artificially elevated estrogen levels found that the hormone alters activity in a brain circuit connecting the hypothalamus and hippocampus, leading to temporary memory impairments. The findings suggest that these changes are not indicative of cognitive decline but rather affect certain types of memory, such as spatial and verbal recall.
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Dr. Zheng Sun, a professor at Baylor College of Medicine, emphasized that while the effects can impact daily tasks, they are not medically serious. It’s not about losing intelligence, but rather specific cognitive functions being affected, he explained. Similar results were observed in human trials involving 70 pregnant women, where higher estrogen levels correlated with reduced memory performance.
Dr. Yanlin He from Louisiana State University noted that while the mouse experiments provided clear evidence, direct testing in humans is not feasible. The human data supports the hypothesis, but causality remains more established in animal models, he said. The research, published in Science Bulletin, offers new insights into the physiological basis of common pregnancy-related memory issues.
Reporting by Policy-Wire (PW)