The shoulders follow the head: postcranial constraints on human childbirth.
Trevathan
W
W
Rosenberg
K
K
D000818:Animals; D005260:Female; D006257:Head / Q000033:anatomy & histology*; D015186:Hominidae / Q000033:anatomy & histology*; D006801:Humans; D007743:Labor, Obstetric / Q000502:physiology*; D010388:Pelvis / Q000033:anatomy & histology; D011247:Pregnancy; D012641:Selection, Genetic; D012782:Shoulder / Q000033:anatomy & histology*