What's the deal with pregnancy brain? (feat. Allison Williams)

This week, Emily and Perry are joined by actress Allison Williams to discuss all things pregnancy brain. Are the fog and forgetfulness due to actual brain shrinkage? Does it replenish itself postpartum? Do women ever actually "bounce back"? What's all this change in the service of, exactly? And, most importantly, how do we support the women in our lives going through this?

Plus: lactate gels at the Tour de France, Bryan Johnson's pesky autoimmune disease, and hail and farewell to the last American Polio survivor.

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