1. Monozygotic twinning: an eight-year experience at a large IVF center
Jaime Knopman, M.D., Lewis C. Krey, Ph.D., Jennifer Lee, M.S., Mary Elizabeth Fino, M.D., Akiva P. Novetsky, M.D., Nicole Noyes, M.D. 
Fertility and Sterility 
Volume 94, Issue 2, Pages (July 2010)
DOI: /j.fertnstert
Copyright © 2010 American Society for Reproductive Medicine Terms and Conditions

2. Figure 1
Oocyte source of the documented 98 monozygotic twin (MZT) pregnancies.
Fertility and Sterility  , DOI: ( /j.fertnstert )
Copyright © 2010 American Society for Reproductive Medicine Terms and Conditions

3. Figure 2
Ultrasound documentation of monozygotic twin (MZT) pairs and fetal membrane configuration. D-D = dichorionic-diamniotic; M-D = nions (monochorionic-diamniotic; M-M = monochorionic-monoamniotic.
Fertility and Sterility  , DOI: ( /j.fertnstert )
Copyright © 2010 American Society for Reproductive Medicine Terms and Conditions

4. Figure 3
Fate of the monozygotic twin (MZT) pair in pregnancies where at least one infant (including a coexisting singleton) was delivered alive. In 39 out of 63 (62%) of these pregnancies, a coexistent singleton was present.
Fertility and Sterility  , DOI: ( /j.fertnstert )
Copyright © 2010 American Society for Reproductive Medicine Terms and Conditions

5. Figure 4
Fate of the monozygotic twin (MZT) pairs in pregnancies where there was no coexisting singleton gestation and no infant was delivered alive.
Fertility and Sterility  , DOI: ( /j.fertnstert )
Copyright © 2010 American Society for Reproductive Medicine Terms and Conditions