Obstetric data and pregnancy outcomes of twins with twin-twin transfusion syndrome (TTTS) and controls
| TTTS | Controls | |
| Number of pregnancies | 17 | 17 |
| Gestation at diagnosis (weeks) | 21.8 (18–28) | N/A |
| Gestation at delivery (weeks) | 28.7 (23–36) | 28.9 (23–36) |
| Number of amnioreductions | 2.1 (1–4) | N/A |
| Total volume of amniotic fluid drained (litres) | 4.4 (1.6–13.6) | N/A |
| Intrauterine fetal death | 5 | 1 |
| Neonatal death | 6 | 5 |
| Surviving twins | 23 (68) | 28 (82) |
| Pregnancies with both twins | 10 (59) | 13 (76) |
| Pregnancies with one twin | 3 (18) | 2 (12) |
| Pregnancies with neither twin | 4 (24) | 2 (12) |
Values are number, number (%), or mean (range).
N/A, not applicable.