Table 6.
Perinatal outcomes for twin pregnancies
| Perinatal outcomes | All twin pregnancies (n=37)† | Chorionicity | |
| DCDA (n=23) | MCDA (n=10) | ||
| Live births | |||
| Both babies: | |||
| No/total No (%) expectant management‡ | 14/34 (41) | 10/21 (48) | 3/9 (33) |
| Worst-best possible outcome (range) (minimum No/total No (%) to maximum No/total No (%))§ | 14/37 (38) to 17/37 (46) | 10/23 (43) to 12/23 (52) | 3/10 (30) to 4/10 (40) |
| Single baby: | |||
| No/total No (%) expectant management‡ | 3/34 (9) | 1/21 (5) | 2/9 (22) |
| Worst-best possible outcome (range) (minimum No/total No (%) to maximum No/total No (%))§ | 3/37 (8) to 12/37 (32) | 1/23 (4) to 6/23 (35) | 2/10 (20) to 4/10 (40) |
| Survival to hospital discharge | |||
| Both babies: | |||
| No/total No (%) expectant management‡* | 6/30 (20) | 5/19 (26) | 1/8 (13) |
| Worst-best possible outcome (range) (minimum No/total No (%) to maximum No/total No (%))§ | 6/37 (16) to 10/37 (27) | 5/23 (22) to 7/23 (35) | 1/10 (10) to 2/10 (20) |
| Single baby: | |||
| No/total No (%) expectant management‡* | 5/30 (17) | 3/19 (16) | 2/8 (25) |
| Worst-best possible outcome (range) (minimum No/total No (%) to maximum No/total No (%))§ | 5/37 (14) to 17/37 (46) | 3/23 (13) to 10/23 (43) | 2/10 (20) to 5/10 (50) |
| Termination for medical reasons | |||
| No/total No (%) terminations for medical reasons of both fetuses | 3/37 (8) | 2/23 (9) | 1/10 (10) |
| No/total No (%) terminations for medical reasons of one fetus | 6/37 (16) | 5/23 (22) | 1/10 (10) |
DCDA=dichorionic-diamniotic; IQR=interquartile range; MCDA=monochorionic-diamniotic.
*Excludes pregnancies with babies that were live born at ≥22+0 weeks' gestational age with missing discharge status: dichorionic-diamniotic discharge status missing for both babies (n=2); monochorionic-diamniotic discharge status missing for one baby (n=1); unknown chorionicity discharge status missing for one baby (n=1).
†Four twin pregnancies with unreported chorionicity were included in the all twin pregnancies data only. The one triplet pregnancy was excluded from this table.
‡Excludes pregnancies with termination for medical reasons.
§Includes pregnancies with termination for medical reasons and missing discharge status.