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

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

	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)

ISSN: 1477-7827