Korean J Obstet Gynecol.
2001 Jun;44(6):1201-1204.
A Case of Diamnionic Monochorionic Monozygotic Twin Which was Conceived by In Vitro Fertilization
- Affiliations
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- 1Department of Obstetrics and Gynecology, College of Medicine, Pocheon CHA University, Pocheon, Korea.
- 2Department of Genetics, College of Medicine, Pocheon CHA University, Pocheon, Korea.
- 3Department of Embryology, College of Medicine, Pocheon CHA University, Pocheon, Korea.
Abstract
- Monozygotic twinning is a relatively rare event in vivo conception, being estimated to occur in 0.42% of all birth. The underlying mechanism for monozygotic twin formation is the division of the embryo early in its development. Separation of cells may theoretically occur before or after inner cell mass formation. The incidence of monozygotic twinning following assisted reproduction techniques is higher than the commonly accepted incidence after in vivo conception. Patients at particular risk of monozygotic twins are those aged > 35 years and those who had manipulation techniques for assisted fertilization. Hence, it seems prudent to counsel these patients about the potential obstetric complications of monozygotic multiple gestations prior to the initiation of their treatment.
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