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twin pregnancy

 

Definition: a pregnancy in which two embryos develop in the uterus at the same time; dizygotic twins are derived from two zygotes that develop from two fertilized oocytes; monozygotic twins are derived from one zygote that develops from a single fertilized oocyte; the zygote divides at an early stage of development to form two embryos.

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© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review date: Sep 19, 2016.

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