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Chorionic numbers and fetuses in 1218 cases.
| Chorionic Numbers Detected by Sonography | Case Number | % |
|---|---|---|
| Singleton | 1166 | 95.73% |
| DCDA twin | 22 | 1.81% |
| MCDA twin | 10 | 0.82% |
| MCDA vanishing twin with empty second amniotic sac | 3 | 0.25% |
| DCDA vanishing twin with an empty sac |
12 | 0.99% |
| DCDA vanishing twin with a nonviable fetus | 5 | 0.41% |
| Total | 1218 | 100% |
DCDA; dichorionic diamniotic, MCDA; monochorionic diamniotic.
