vanishing twin(redirected from Vanishing twin syndrome)
Also found in: Acronyms.
a twin embryo or fetus that is aborted during pregnancy.
Diagnosis Ultrasound in 1st trimester
vanishing twinThe spontaneous regression of a 2nd gestational product, which occurs in 20% of twin gestations Diagnosis Ultrasound in 1st trimester. Cf Twins.
Fetal resorption in multiple gestation.See: gestation, multiple
See also: twin