Vanishing Twin Syndrome

OGBYN Sheryl Ross, MD, explains what vanishing twin syndrome is, what vanishing twin syndrome is caused by, when it occurs during pregnancy, and how likely it is to happen
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Vanishing Twin Syndrome

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The phenomenon of vanishing twin syndrome is diagnosed during the first trimester, through ultrasound, identifying two gestational sacks. What ultimately happens is that one sack can be lost, absorbed, or vanishes by the second trimester. Therefore, only one sack continues. This is seen in about 20-60 percent in spontaneous twin pregnancies.

OGBYN Sheryl Ross, MD, explains what vanishing twin syndrome is, what vanishing twin syndrome is caused by, when it occurs during pregnancy, and how likely it is to happen

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Sheryl Ross, MD

Obstetrician & Gynecologist

Sheryl A. Ross, MD, received her OB/GYN training at the University of Southern California School of Medicine and she was honored with two teaching awards as a senior medical resident. She was a medical consultant on the books Expecting Fitness and Two at a Time.  She also has appeared on MTV, consulted for Fit Pregnancy, People, In Touch, and Shape Magazine. She has been in private practice in Santa Monica, California for the past 20 years. In addition to her medical practice, Dr. Ross was the President of the Upper and Middle Division of Brentwood School and has been on the board of Planned Parenthood, Los Angeles, for three years. She is married and has three children.

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