title: Bornean orang-utan twins born in captivity.
mesh_terms: D000704:Analysis of Variance; D000818:Animals; D000836:Animals, Zoo; D001724:Birth Weight; D001893:Borneo; D005260:Female; D015186:Hominidae; D008297:Male; D010920:Placenta / Q000033:anatomy & histology; D011247:Pregnancy; D014427:Twins; D014861:Washington