What percentage of twin pregnancies will deliver a singleton pregnancy?

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Multiple Choice

What percentage of twin pregnancies will deliver a singleton pregnancy?

Explanation:
Twin pregnancies often experience spontaneous reduction of one fetus, known as vanishing twin syndrome. When one twin stops developing early, the pregnancy continues with a single fetus and typically delivers as a singleton infant. This is why a large portion of twin pregnancies end as singleton deliveries; about seven in ten twin pregnancies will deliver a singleton pregnancy. The other roughly three in ten continue as twins (or higher multiples) to delivery. This vanishing of one fetus usually occurs in the first trimester and is more commonly noted on early ultrasound.

Twin pregnancies often experience spontaneous reduction of one fetus, known as vanishing twin syndrome. When one twin stops developing early, the pregnancy continues with a single fetus and typically delivers as a singleton infant. This is why a large portion of twin pregnancies end as singleton deliveries; about seven in ten twin pregnancies will deliver a singleton pregnancy. The other roughly three in ten continue as twins (or higher multiples) to delivery. This vanishing of one fetus usually occurs in the first trimester and is more commonly noted on early ultrasound.

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