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Table 3 Summary of multiple linear regression analysis for parameters associated with pre-ovulatory serum progesterone

From: Reproducibility and clinical significance of pre-ovulatory serum progesterone level and progesterone/estradiol ratio on the day of human chorionic gonadotropin administration in infertile women undergoing repeated in vitro fertilization cycles

Parameter B SE (B) β Sig.(p)
Age (years) −0.010 0.007 −0.022 0.677
Body mass index (kg/m2) 0.000 0.011 −0.003 0.955
Number of gonadotropin ampoules used 0.003 0.003 0.076 0.234
Duration of stimulation (day) 0.025 0.021 0.069 0.244
Estradiol (pg/mL) on hCG day 6.995E-5 0.000 0.152 0.009
Number of oocytes retrieved 0.039 0.010 0.235 < 0.001
Endometrium thickness (mm) −0.021 0.010 −0.098 0.043
R2 0.111    
F 7.208*    
  1. * P < 0.001