Table 4 Multivariable logistic regression analysis for detecting prognostic factors regarding live birth rate

Women’ age

-0.04

0.95

(0.90–1.02)

0.16

Women’ body mass index

0.05

1.04

(0.89 − 0.12)

0.55

Cause of infertility

 Polycystic ovary syndrome

-

Reference group

-

 Male factor

0.32

1.37

(0.76–2.50)

0.28

 Tubal factor

-0.49

0.60

(0.22–1.65)

0.32

 Unexplained factor

0.07

1.08

(0.41–2.79)

0.87

 Mixed factor (both male and female)

− 0.32

0.72

(0.24–2.17)

0.56

Number of MII oocyte

0.07

1.07

(0.92–1.25)

0.34

Number of transferred embryos

0.15

1.16

(0.67-2.0)

0.57

Endometrial thickness on ET day

0.09

1.09

(0.90–1.31)

0.34

Progesterone value quartile (Q₁) on ET day (< 19 ng/ml)

-0.16

0.851

(0.42–1.70)

0.650

Progesterone value Q₂ on ET day (19–29 ng/ml)

-

Reference group

-

-

Progesterone value Q₃ on ET day (29–49 ng/ml)

-0.65

0.51

(0.25–1.06)

0.073

Progesterone value Q₄ on ET day (> 49 ng/ml)

-1.41

0.24

(0.10–0.54)

0.001

Estradiol value Q₁ on ET day (< 411 pg/m)

-

Reference group

-

-

Estradiol value Q₂ on ET day (411–632 pg/ml)

0.60

1.82

(0.87–3.83)

0.11

Estradiol value Q₃ on ET day (632–905 pg/ml)

0.33

1.39

(0.65–2.96)

0.38

Estradiol value Q₄ on ET day (> 905 pg/ml)

-0.43

0.65

(0.28–1.46)

0.30