| Age Groups (years) | Third Trimester | Control |
| 20 - 22 | 18 | 28 |
| 23 - 25 | 23 | 28 |
| 26 - 28 | 7 | 4 |
| 29 - 31 | 9 | 0 |
| 32 - 34 | 3 | 0 |
| >34 | 0 | 0 |
| Total | 60 | 60 |
| Mean Age (yrs) ± SD | 24.75 ± 3.51 | 22.80 ± 1.75 |