| Ref. | Study Type | Intervention | Population/Sample Size | Results/Benefits | Adverse Effects |
| [44] | Randomized Control Trial | Physical Activity and Exercise | 124 women (<14 weeks Pregnancy) | Stretching exercise may be more effective than walking in reducing the risk of pre-eclampsia. | Not Reported |
| [43] | Systematic Review | Physical Activity and Exercise | 2 small, good quality trials with 45 women | Insufficient evidence for reliable conclusions | Insufficient evidence |
| [45] | Systematic Review | Physical Activity and Exercise | 2 small, low quality trials (106 women) | Insufficient evidence for reliable conclusions | Insufficient evidence |