Progesterone on hCG day

≤1.5 ng/ml (n = 248)

Progesterone on hCG day

>1.5 ng/ml (n = 54)

P value

Retrieved oocytes No.

10.79 ± 1.23

15.81 ± 1.56

0.000*

Retrieved M II oocytes No.

6.86 ± 1.51

8.93 ± 2.57

0.000*

Maturation rate %

(M II/oocytes retrieved)

63.6 ± 14.1

56.5 ± 14.0

0.000*

Fertilized oocytes No.

4.56 ± 0.69

5.29 ± 1.27

0.000*

Fertilization rate %

(Fertilized/M II retrieved)

66.5 ± 14.1

59.3 ±17.9

0.002*

Cleaved embryos No.

4.48 ± 0.66

4.89 ± 1.15

0.000*

Embryos cleavage rate %

(Cleaved/fertilized)

98.2 ± 0.7

92.5 ± 1.6

0.000*

Clinical pregnancy (%)

80 (32.3%)

7 (13.0%)

0.002*

Live birth (%)

58 (23.4%)

6 (11.1%)

0.030*