MONOCHORIAL TWINS

are always mono-zygotic. They are twins, in utero, which have shared the same embryonic membrane which is the outermost one (the chorion membrane) in the womb.

MONOCHORIAL TWINS: "The formation of monochorial twins occurs when two embryos share the same embryonic membrane."
Cite this page: N., Pam M.S., "MONOCHORIAL TWINS," in PsychologyDictionary.org, April 7, 2013, https://psychologydictionary.org/monochorial-twins/ (accessed June 14, 2021).
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