It's nothing compared to what women's bodies goes through—but men experience hormonal changes when their partners are pregnant, finds a new University of Michigan study. Researchers tested the hormone levels of first-time fathers-to-be and found that their testosterone dropped as the baby grew.
Don't panic—we're not talking clinically low T levels, says study author Robin Edelstein, Ph.D. But the changes could be just enough to subtly influence his personality, like making him more nurturing and devoted to you and your future child (not such a bad thing).
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