Maternal physical activity before IVF/ICSI cycles improves clinical pregnancy rate and live birth rate: a systematic review and meta-analysis

Table 3 Subgroup analysis for the effect of maternal physical activity on pregnancy outcome following IVF/ICSI

Subgroup	No. of studies	OR (95% CI)	Tau²	I ²	P_subgroup
Age, BMI controlling
Clinical pregnancy rate
Yes	4	2.92 (1.89–4.52)	0	0
No	3	1.50 (1.04–2.15)	0.04	38	0.02
Miscarriage rate
Yes	4	0.85 (0.37–1.92)	0.32	46
No	2	0.59 (0.19–1.84)	0.36	52	0.62
Live birth rate
Yes	5	2.10 (0.90–4.86)	0.72	85
No	1	1.60 (0.98–2.60)	N/A	N/A	0.58
Exercise > 2.5 h/week in physical active women
Clinical pregnancy rate
Yes	4	1.56 (1.11–2.21)	0.03	27
NO/ Not clear^a	3	2.91 (1.83–4.62)	0	0	0.03
Miscarriage rate
Yes	3	0.71 (0.32–1.55)	0.09	16
NO/ Not clear^a	3	0.70 (0.19–2.56)	0.77	64	0.99
Live birth rate
Yes	2	1.65 (1.07–2.56)	0	0
NO/ Not clear^a	4	2.16 (0.84–5.54)	0.79	88	0.62

The subgroup analysis was not conducted on implantation rate since there were only 3 studies reported this data
OR odds ratio, CI confidence interval, N/A not applicable
^aIntensity of physical activity was not > 2.5 h/week in physical active women in these studies, or the data was not clearly described

ISSN: 1477-7827