Table 1 Baseline characteristics of PCOS patients among different groups

Age

29.56\(\pm\)3.50

30.10\(\pm\)3.56

0.113

29.85\(\pm\)3.48

29.29\(\pm\)3.67

0.086

Body mass index

kg/m²

21.87(20.00,24.24)

24.43(22.47,26.59)

< 0.001

22.21(20.08,24.97)

22.70(20.91,24.98)

0.066

Duration of infertility

(years)

3.00(2.00,5.00)

4.00(2.00,6.00)

0.053

3.00(2.00,5.00)

3.00(2.00,5.00)

0.510

Type of infertility

0.014

0.173

Primary infertility

344(68.53%)

76(56.72%)

273(68.08%)

103(62.05%)

Secondary infertility

158(31.47%)

58(43.28%)

128(31.92%)

63(37.95%)

Protocol

0.197

0.357

Long GnRH agonist protocol

70(13.94%)

11(8.21%)

43(10.72%)

25(15.06%)

GnRH antagonist protocol

420(83.67%)

119(88.81%)

347(86.53%)

137(82.53%)

others

12(2.39%)

4(2.99%)

11(2.74%)

4(2.41%)

Basic FSH

5.00\(\pm\)1.28

4.95\(\pm\)1.21

0.691

5.04\(\pm\)1.21

4.83\(\pm\)1.27

0.058

Basic LH

6.62\(\pm\)4.04

7.24\(\pm\)7.19

0.196

6.85\(\pm\)5.37

6.47\(\pm\)3.82

0.404

Number of retrieved oocytes

20.00(13.00,26.25)

20.00(14.00,29.00)

0.526

19.00(13.00,26.00)

20.00(14.00,29.00)

0.134

Fertilization rate

0.81(0.67,0.90)

0.77(0.63,0.88)

0.097

0.81(0.67,0.90)

0.78(0.61,0.89)

0.096

High quality embryo rate

0.75(0.50,1.00)

0.76(0.34,1.00)

0.828

0.77(0.50,1.00)

0.74(0.50,1.00)

0.247