🧬 Human pelvic evolution reflects a tug-of-war between 🚶‍♀️ efficient walking, 🧠 growing brains, and 🚼 safe childbirth.

Using AI and genetic data from 31,115 individuals, Xu et al. found the pelvis is highly heritable, sex-dimorphic, and shaped by multiple selective pressures—not just bipedalism or birth.

Larger canals ease delivery but risk 💥 pelvic floor disorders, while narrower ones boost mobility but raise ⚠️ labor complications.

This study reframes the "obstetrical dilemma" as a 🔄 multifactorial evolutionary compromise.