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Table 2 Intraclass correlation coefficients of pre-ovulatory serum progesterone concentration and P/E2 ratio in patients who underwent repeated consecutive in vitro fertilization cycles

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

  Intraclass correlation coefficient (ICC)
2 cycles 3 cycles ≥ 4 cycles
Number of patients (cycles) 125 (250 cycles) 52 (156 cycles) 26 (118 cycles)
Pre-ovulatory serum P on hCG day (95 % CI) −0.052 (−0.24 ~ 0.14) 0.163 (−0.01 ~ 0.37) 0.212 (0.00 ~ 0.52)
P/E2 ratio on hCG day (95 % CI) 0.180 (−0.01 ~ 0.36) 0.168 (−0.13 ~ 3.77) 0.148 (−0.06 ~ 0.46)
  1. CI, confidence interval