Table 3 Clinical characteristics of patients by NAM concentration tertiles

 Median

33.61

43.88

59.38

 Range

8.57–38.78

38.8–49.29

49.39–251.15

Age (years)

32.29 ± 0.74

32.52 ± 0.75

31.67 ± 0.59

0.674

BMI (kg/m²)

22.35 ± 0.41

22.86 ± 0.39

22.41 ± 0.46

0.649

AFC (n)

15.32 ± 0.85

15.84 ± 1.05

14.71 ± 0.79

0.680

Basal LH (mIU/ml)

4.76 ± 0.32

4.68 ± 0.43

4.46 ± 0.36

0.844

Basal FSH (mIU/ml)

10.07 ± 0.78

8.23 ± 0.53

9.12 ± 0.55

0.120

AMH (ng/ml)

3.11 ± 0.33

3.53 ± 0.42

3.07 ± 0.32

0.610

Basal E2 (pg/ml)

37.37 ± 2.40

65.29 ± 8.40

42.05 ± 3.42

0.001*

Gn duration (days)

10.94 ± 0.42

10.75 ± 0.37

10.57 ± 0.34

0.793

Gn dose (IU)

2386.91 ± 102.02

2350.78 ± 100.21

2338.89 ± 101.41

0.941

E2 on HCG day (pmol/L)

3666.62 ± 393.25

4027.55 ± 582.21

4198.32 ± 407.98

0.719

Progesterone on HCG day (nmol/L)

1.05 ± 0.10

1.05 ± 0.14

1.02 ± 0.07

0.975

LH on HCG day (IU/L)

1.95 ± 0.34

1.81 ± 0.34

2.00 ± 0.38

0.923

FSH on HCG day (IU/L)

16.10 ± 0.68

15.09 ± 0.54

15.44 ± 0.42

0.425

Oocytes retrieved (n)

10.94 ± 1.16

10.33 ± 1.05

11.78 ± 1.00

0.633

Mature oocytes (n)

7.46 ± 0.85

8.33 ± 0.91

8.79 ± 0.76

0.527

Oocyte maturation rate (%)

67.90 ± 3.32

77.37 ± 2.99

78.56 ± 2.57

0.023*

Fertilization rate (%)

67.84 ± 3.33

76.84 ± 2.99

78.28 ± 2.57

0.030*

Cleavage rate (%)

92.82 ± 3.09

95.93 ± 2.28

97.61 ± 0.98

0.328

High-quality embryo rate (%)

49.06 ± 4.17

51.86 ± 4.27

48.31 ± 3.58

0.805

Clinical pregnancy rate (%)

47.84 ± 6.12

46.33 ± 6.03

53.19 ± 5.80

0.688