education.decodee on Instagram: "- The video, from a Spanish-language anatomy exhibit, demonstrates sexual dimorphism where the female pelvis's wider inlet (about 11 cm vs. 10 cm in males) and shallower depth enable a 10 cm fetal head to pass, while the male's narrower structure blocks it, as confirmed by geometric morphometric studies like Betti et al. (2014) in the Journal of Human Evolution. - Human pelvic adaptations reflect an evolutionary trade-off: bipedalism narrowed the pelvis for effic