| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1st trimester | 96 |
17%
|
| 2 | 2nd trimester | 86 |
15.2%
|
| 3 | 3rd trimester | 370 |
65.4%
|
| 8 | Don't know | 14 |
2.5%
|
| 9 | 3 | ||
| Sysmiss | 3634 |