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Study identifies brain circuit behind 'pregnancy brain' forgetfulness

Researchers link sustained high estrogen during pregnancy to temporary memory disruption via disrupted neurons between the hypothalamus and hippocampus.

newest coverage 19h agosummary written 17h ago6 pieces NewswiresGoogle News

What to know

  • Scientists identified the biological mechanism behind 'pregnancy brain': high estrogen during pregnancy disrupts signaling between the hypothalamus and hippocampus, temporarily impairing memory.
  • About 80% of pregnant women experience these cognitive changes, which typically peak in late pregnancy and postpartum but resolve after childbirth.
  • The condition affects specific memory tasks (forgetting why you entered a room, misplacing items, losing conversational threads) but does not represent general cognitive decline or loss of intelligence.

“About 80 per cent of pregnant women notice those changes, but that figure largely reflects self-report and subjective experience rather than objective testing.”

Dr. Zheng Sun, Study leader, Baylor College of Medicine · Channel News Asia ↗

Dr. Zheng Sun Study leader, Baylor College of MedicineDr. Yanlin He Study leader, Louisiana State UniversityBaylor College of Medicine Research institution

Study identifies brain circuit behind 'pregnancy brain' forgetfulness
The Hindu

How it unfolded 1 development · click the chart to see its coverage articles

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Sep 22yesterdaynow · 2:07 AM ET
  1. 1

    Research confirms 80% of pregnant women experience cognitive changes, typically reversible

    The study found that about 80% of pregnant women notice memory and cognitive changes, most commonly forgetting why they entered a room, misplacing items, or losing conversational threads. The condition becomes most evident in late pregnancy and the postpartum period but usually dissipates after childbirth.

    “It is not serious or medically disabling, although it does affect daily functioning and confidence.”
    — Dr. Zheng Sun, Study leader, Baylor College of Medicine · source
  2. background

    Mechanism isolated: estrogen receptor alpha drives memory suppression pathway — The study found that the protein estrogen receptor alpha transmits estrogen's signals into cells, with high estrogen increasing hypothalamus neuron activity, which in turn suppresses hippocampus activity responsible for memory formation. The effect is temporary and specific to certain cognitive tasks rather than representing general cognitive decline.

  3. background

    Study identifies estrogen-driven brain circuit disruption underlying pregnancy forgetfulness — Researchers at Baylor College of Medicine and Louisiana State University published findings in Science Bulletin identifying how sustained high estrogen during pregnancy disrupts a neuronal pathway between the hypothalamus and hippocampus, causing temporary memory impairment in mouse models without affecting mood.

Also covered reported alongside — the timeline has no entry for these yet

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