Table 1 Demographics and clinical characteristics of the participants according to oocyte yield

Age (years)

32.4 ± 0.2

32.4 ± 0.4

32.6 ± 0.3

31.9 ± 0.6

0.6

BMI (kg/m²)

24.6 ± 0.2

21.0 ± 0.1^a

25.6 ± 0.2^b

30.6 ± 0.2^c

<0.0001

Nulliparity

193 (73.1)

74 (79.6)

95 (69.8)

22 (62.9)

0.7

Day 3 FSH (mIU/mL)

8.7 ± 0.1

9.0 ± 0.2

8.5 ± 0.2

8.3 ± 0.4

0.2

Day 3 estradiol

53.9 ± 2.0

50.2 ± 2.2

57.7 ± 3.3

49.1 ± 3.5

0.1

Antral follicle count

13.3 ± 0.5

14.2 ± 1.1

12.6 ± 0.4

13.8 ± 1.0

0.3

Days of stimulation

11.1 ± 0.5

12.8 ± 1.3^a

10.1 ± 0.1^b

10.2 ± 0.2

0.03

Total dose of gonadotropins

456.6 ± 8.0

427.6 ± 14.4 ^a

464.3 ± 11.1

503.6 ± 13.9^b

0.04