Article
Incidence and zygosity of twin births following transfers using a single fresh or frozen embryo
22 Apr 2014
Abstract excerpt
STUDY QUESTION: Are all twin births following single embryo transfer (SET) monozygotic? SUMMARY ANSWER: Between 1 in 10 and in 1 in 5 twins born after SET are the result of a concurrent natural conception. WHAT IS KNOWN ALREADY: The twinning rate after SET is higher than following natural conception. Most studies of twins following SET have incorrectly assumed monozygosity or have not been able to assess the...
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