You are probably going for placenta.
The placenta.
The term is ectopic pregnancy.
Ectopic pregnancy is the more commonly-used medical term for extrauterine pregnancy.
The medical term for appendages or accessory structures of an organ is "adnexa".
Prolapse is the term meaning dropping of an organ.
hypoplasia
parenchymal: essential, distinctive cells of an organ.
Ectopic pregnancy aka tubal pregnancy.
primigravida
Hyperemesis gravidarum is the term for excessive vomiting during pregnancy.
lavage
hermaphrodite