Dichorionic twins
Pronunciation: die-kor-ee-ON-ik
Also written as: DC — dichorionic
Twin pregnancy where each fetus has its own separate placenta and chorion.
Full Definition
Dichorionic twins are twin pregnancies where each fetus develops within its own separate chorioamniotic sac, with distinct placentas and chorions. This type includes all dizygotic (fraternal) twins and approximately one-third of monozygotic (identical) twins. Dichorionic twins have the lowest risk of pregnancy complications compared to monochorionic twins, as they do not share placental circulation and therefore are not at risk for twin-to-twin transfusion syndrome. Early ultrasound identification of chorionicity is crucial for appropriate pregnancy monitoring and counseling.
Usage
Usage note: Always specify both chorionicity and amnionicity in twin pregnancy documentation.
In Context
- "Early ultrasound confirmed dichorionic diamniotic twin pregnancy at 8 weeks gestation." — First trimester ultrasound report
- "The thick dividing membrane and twin peak sign confirm dichorionic placentation." — Chorionicity assessment