Table 2.

The pooled results of forest plot for clinical outcomes.

Clinical outcomes	Participants (n)	OR/SMD/MD 95% CI	p	I2 (%)	Model
Clinical pregnancy rate	1447	1.84 [1.33, 2.53]	0.0002	29	Random
The number optimal embryos	266	0.59 [0.21, 0.96]	0.002	64	Random
Cycle cancellation rate	1393	0.60 [0.44, 0.83]	0.002	0	Fixed
Miscarriage rate	145	0.38 [0.15, 0.98]	0.05	0	Fixed
The number of oocytes retrieved	330	1.30 [1.21, 1.40]	< 0.00001	0	Fixed
E2 levels on the day of hCG	180	0.37 [0.07, 0.66]	0.01	0	Fixed
Endometrial thickness on the day of hCG	349	0.53 [-0.23, 1.29]	0.17	91	Random
Total days of Gn used	1166	−0.89 [-1.37, −0.41]	0.0003	47	Random
Total dose of Gn used	1360	−330.44 [-373.93, −286.96]	< 0.00001	28	Random