There are some data stating that there is no difference in preterm delivery rate between mono and dichorionic
pregnancies after ART (16,17).Most of the authors report opposite results.
The authors recommended that dichorionic
pregnancies be delivered at 37 weeks and that the evidence for delivery of monochorionic twins prior to 36 weeks is lacking.
The level of birth weight discordance was analyzed and illustrated by the larger spatial differences between the Kaplan-Meier curves for dichorionic
Hence more among the monochorionic diamniotic (MCDA) compared to dichorionic
diamniotic (DCDA) twins.4,5 Even in uncomplicated monochorionic twins this risk is high.6-8
Chorionicity was classified as: dichorionic
diamniotic (DCDA), monochorionic diamniotic (MCDA) and monochorionic monoamniotic (MCMA).
A 23-year-old primigravida with a dichorionic
diamniotic twin pregnancy following IVF-ET first presented at our hospital at 9 weeks of gestation in June, 2014.
Delivery for uncomplicated dichorionic
twin pregnancies should be considered at 37 weeks' gestation, a week earlier than is generally recommended in the United States, according to a systematic review and meta-analysis of studies that reported rates of stillbirth and neonatal mortality at various gestational ages.
Her first pregnancy at 2012 was diagnosed to be dichorionic
twin pregnancy and her second pregnancy at 2014 was a singleton pregnancy.
The mean NT measurement was higher in monochorionic than in dichorionic
twins this may take the form of a vanishing twin.(called gross reduction.
This "changes the kind of tests you order and the things you see" compared with dichorionic
twins, he said.
Chorionicity is best seen at the 11-14 weeks scan during which time the dichorionic
diamniotic pregnancy shows a twin peak sign (lambda sign).