amniogenesis

noun
am·​nio·​gen·​e·​sis | \ ˌam-nē-(ˌ)ō-ˈjen-ə-səs How to pronounce amniogenesis (audio) \
plural amniogeneses\ -​ˌsēz How to pronounce amniogeneses (audio) \

Medical Definition of amniogenesis

: amnion formation