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.
: 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.