Pregnancy reshapes the brain: a landmark study tracks maternal changes across gestation and after birth

A large longitudinal study of 127 first‑time mothers finds pregnancy reduces grey‑matter volume in regions tied to emotion, empathy, and social perception—an effect linked to estrogen that begins before birth and largely recovers by six months postpartum. The pattern, which mirrors adolescent brain changes, suggests pregnancy primes the maternal brain for infant care, with some lasting brain changes detectable years later.