Table 1 Baseline characteristics of patients completing the study ^a

Age (years)

36.6 ± 3.8

37.5 ± 3.5

Infertility duration (years)

2.3 ± 2.1

2.4 ± 3.1

Number of previous ART attempts

0.3 ± 0.8

0.2 ± 0.4

Gravidity

0.8 ± 0.8

1.0 ± 1.1

Parity

0.5 ± 0.6

0.4 ± 0.6

Body mass index (kg/m²)

20.9 ± 2.3

21.1 ± 2.8

Anti-Müllerian hormone (AMH, ng/mL)

0.98 ± 0.54

0.91 ± 0.49

Follicle-stimulating hormone on day 3 (IU/L)

9.2 ± 6.4

8.6 ± 4.7

Luteinizing hormone on day 3 (IU/L)

4.3 ± 2.7

4.0 ± 1.8

Prolactin (ng/mL)

7.3 ± 3.5

8.8 ± 6.1

Estradiol on day 3 (pg/mL)

32 ± 16

41 ± 28

Free testosterone on day 3 (FT, pg/mL) ^b

0.60 ± 0.02, n = 24

0.60 ± 0.00, n = 25

Testosterone on day 3 (T, ng/mL) ^b

0.16 ± 0.08, n = 26

0.17 ± 0.08, n = 24

Thyroid-stimulating hormone (TSH, μIU/mL)

1.88 ± 1.07 ^c

2.46 ± 1.40

Free thyronine (pg/mL)

2.92 ± 0.32

2.84 ± 0.43

Free thyroxine (FT₄, ng/dL)

1.23 ± 0.14

1.23 ± 0.13

Fasting plasma glucose (mg/dL)

81.9 ± 6.7, n = 49

82.9 ± 6.7, n = 47

Fasting serum insulin (μU/mL)

4.3 ± 1.9, n = 49

4.7 ± 2.0, n = 47