This happens in about 0.1% of all pregnancies and 1% oftwin pregnancies.
This is important to know to monitor for possible pregnancy complications.
The survival rate for mono mono twins is 70%.
Jill Lehmann Photography / Getty Images
However, healthcare providers can offer guidance to improve outcomes and reduce the risk of complications.
For example, one may be noticeably bigger than the other, and their fingerprints are not the same.
Mono mono twins are generally delivered between 33 and 34 weeks to treat and prevent complications.
Columbia University Department of Obstetrics and Gynecology.Monoamniotic twins.
Jha P, Morgan TA, Kennedy A.US evaluation of twin pregnancies: Importance of chorionicity and amnionicity.RadioGraphics.
2019;39(7):2146-2166. doi:10.1148/rg.2019190042
NIH National Human Genome Institute.Identical twins.
2022;307(1):233-239. doi:10.1007/s00404-022-06506-3
