| No. |
| Average | SD | Minimum | Maximum | |
| 42 (25%) | Pregnant | Group A | 1.29 | 0.43 | 0.7 | 1.8 |
| Group B | 1.27 | 0.33 | 0.7 | 1.7 | ||
| 126 (75%) | Non-pregnant | Group A | 2.27 | 0.58 | 1.0 | 3.7 |
| Group B | 2.25 | 0.57 | 0.9 | 3.3 | ||
| Fisher exact test | F | 2.158 | ||||
| P value | 0.245 | |||||