| Table 1. Maternal age distribution in the two groups. | |||
| Maternal age | AB Group (ART conception) N=1125 (%) |
SB Group (Spontaneous conception) N=7193 (%) |
p-value |
|---|---|---|---|
| 15-20 years | 5 (0.4%) | 308 (4.3%) | <0.001 |
| 21-25 years | 109 (9.7%) | 2827 (39.3%) | <0.001 |
| 26-30 years | 391 (34.8%) | 3029 (42.1%) | <0.001 |
| 31-35 years | 388 (34.5%) | 841 (11.7%) | <0.001 |
| 36-40 years | 168 (14.9%) | 167 (2.3%) | <0.001 |
| >40 years | 64 (5.7%) | 21 (0.3%) | <0.001 |