Yale study examines how the placenta regulates serotonin, with implications for autism research

Connecticut Public – Thursday, September 4, 2025
By Sujata Srinivasan

Serotonin is widely known as one of the human body’s “happiness hormones.”

But Dr. Harvey Kliman, director of the Reproductive and Placental Research Unit at Yale, said serotonin is also a growth hormone — and it works in ways that can result in bigger or smaller babies in utero.

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