Your child's health isn't just shaped in the womb. It starts with your microbiome before conception, and that includes fathers. In this clip, Dr. Elisa Song explains why the gut microbiome of both parents, not just the mother, affects fertility, pregnancy outcomes, and a baby's long-term health, sometimes months before conception even happens. She breaks down epigenetics in plain terms: the idea that your environment, not your DNA, determines the majority of your health outcomes, and how those switches get passed down to your kids.

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