Definition: A rare type of monozygotic twinning where the twins are enclosed within a shared amnion in utero. Because there is no membrane separating the babies, they are at risk for cord entanglement. Sometimes referred to as monoamnionic.
Also Known As: Monoamnionic, Monoamniotic/Monochorionic, "Mo-Mo"
Alternate Spellings: Monoamnionic
Common Misspellings: monoanmiotic, monamnionic, monoamiotic