Table 2.
Pregnancy outcomes at 10 weeks and delivery for patients stratified by initial serum β-hCG levels
| Characteristic | Categories | All study pregnancies | Pregnancies with initial serum β-hCG levels ≤ 50 mIU/mL | Pregnancies with initial serum β-hCG levels > 50 mIU/mL |
|---|---|---|---|---|
| (n) | 2443 | 491 | 1952 | |
| Pregnancy outcome at 10 weeks’ gestation, n (%) | Biochemical pregnancy loss | 483 (19.8) | 320 (65.2) | 163 (8.35) |
| Clinical pregnancy loss | 321 (13.1) | 70 (14.3) | 251 (12.9) | |
| Ectopic pregnancy loss | 18 (0.74) | 13 (2.65) | 5 (0.26) | |
| Ongoing pregnancy | 1512 (61.9) | 76 (15.5) | 1436 (73.6) | |
| Resolved pregnancy of unknown location | 41 (1.68) | 12 (2.44) | 29 (1.49) | |
| Vanishing twin ongoing pregnancy | 10 (0.41) | - | 10 (0.51) | |
| Viable twin gestation | 51 (2.09) | - | 51 (2.61) | |
| Viable triplet gestation | 2 (0.08) | - | 2 (0.10) | |
| Unknown outcomes | 5 (0.20) | - | 5 (0.26) | |
| Pregnancy outcome at delivery, n (%) | Live birth term delivery (> 37 weeks) | 1179 (48.3) | 50 (10.2) | 1129 (57.8) |
| Live birth preterm delivery (< 37 weeks) | 133 (5.44) | 8 (1.63) | 125 (6.40) | |
| Live birth unknown gestation | 27 (1.11) | - | 27 (1.38) | |
| Late clinical pregnancy loss (> 10 weeks’ gestation, < 20 weeks’ gestation) | 64 (2.62) | 6 (1.22) | 58 (2.97) | |
| Intrauterine fetal demise (> 20 weeks’ gestation) | 24 (0.98) | 3 (0.61) | 21 (1.08) | |
| Therapeutic abortion | 16 (0.66) | 1 (0.20) | 15 (0.77) | |
| Unknown outcomes | 132 (5.40) | 8 (1.63) | 124 (6.35) |