Table 2.

The specific results of the scoring system

Study	Primary outcome
	CPR	Sum
High dose
Wu 2022 [31]	+	4
Altutunji 2019 [29]	+	2
Xing 2022 [27]	+	2
Wu 2021 [26]	+	4
Ye 2020 [28]	+	2
Guo 2022 [24]	+	2
Moderate dose
Chen 2009 [23]	-	0
Li 2015 [22]	-	0
Li 2012 [32]	-	0
Li 2009 [33]	-	0
Low dose
Rashidi 2013 [30]	-	-2
Li 2011 [25]	-	-2

LD low dose, MD moderate dose, HD high dose, CPR Clinical pregnancy rate

 + : Between-group differences were statistically significant (P < 0.01, P < 0.05)

-: Between-group differences were no statistically significant (P > 0.05)