vanishing twin


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The spontaneous regression of a 2nd gestational product, which occurs in 20% of twin gestations
Diagnosis Ultrasound in 1st trimester
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.

vanishing twin

The spontaneous regression of a 2nd gestational product, which occurs in 20% of twin gestations Diagnosis Ultrasound in 1st trimester. Cf Twins.
McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.

vanishing twin

Fetal resorption in multiple gestation.
See: gestation, multiple
See also: twin
Medical Dictionary, © 2009 Farlex and Partners
References in periodicals archive ?
Finally, our results, showing that the real frequency of vanishing twin is higher than that detected by ultrasounds are in agreement with the observation that the incidence of first trimester bleeding increases with the number of embryos transferred (21).
Since vanishing twins have been shown by other investigators to be detrimental to the surviving fetus, "our results are yet another argument for elective single embryo transfer," she said.
Vanishing twin: a possible cause for cerebral impairment.
Friedman said this was the first vanishing twin study to control for maternal variables that could influence outcome.
Among the singleton survivors of vanishing twin pregnancies, 66% were exposed to the loss of the twin early in the pregnancy (before 8 weeks), 29% were exposed to the loss between 8 and 22 weeks' gestation (intermediate), and 5% were exposed to the loss after 22 weeks' gestation (late).
-- Women who conceive through in vitro fertilization and have a "vanishing twin" are still at risk of having the remaining twin born at a low birth weight for gestational age, Mohamed Mitwally, M.D., said at the annual meeting of the Pacific Coast Reproductive Society.