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Conjoined twins (CT) are a very rare developmental accident of uncertain etiology. Prevalence has been previously estimated to be 1 in 50,000 to 1 in 100,000 births. The process by which monozygotic(More)
Sirenomelia is a very rare limb anomaly in which the normally paired lower limbs are replaced by a single midline limb. This study describes the prevalence, associated malformations, and maternal(More)
BACKGROUND Trisomy 13 is one of the three autosomal trisomies compatible with viability. It is associated with structural anomalies, learning disability and poor survival. Advanced maternal age is(More)