Dichorionic diamniotic
Pronunciation: dye-core-ee-ON-ic dye-am-nee-OT-ic
Also written as: DCDA — Dichorionic diamniotic
Type of twin pregnancy where each fetus has separate placenta and amniotic sac, carrying lowest risk of complications.
Full Definition
Dichorionic diamniotic (DCDA) refers to a twin pregnancy configuration where each fetus develops within its own chorion (placenta) and amnion (amniotic sac), providing complete separation between the twins. This arrangement occurs in all dizygotic (fraternal) twins and approximately one-third of monozygotic (identical) twins when early embryonic splitting occurs. DCDA twins have the most favorable prognosis among multiple pregnancies due to absent vascular connections between fetuses, eliminating risks of twin-to-twin transfusion syndrome and other complications associated with shared placental circulation. Ultrasound identification relies on detection of the thick intertwin membrane and separate placental masses.
Usage
Usage note: Commonly abbreviated as DCDA. Hyphenate compound adjective forms. Pronunciation guide helpful for verbal communication.
In Context
- "The thick intertwin membrane confirmed dichorionic diamniotic twins with excellent prognosis." — Multiple pregnancy ultrasound
- "Dichorionic diamniotic twins require less intensive monitoring than monochorionic pregnancies." — Clinical management guideline