Table 1.

Progesterone and estradiol reference ranges and measured values within the early-follicular, late-follicular, and midluteal phases of the menstrual cycle

	Progesterone, nmol/l		Estradiol, pmol/l
	Reference	Measured	Reference	Measured
Early-follicular	0.6–4.7	1.9 ± 0.6*	60–854	98 ± 20
Late-follicular	0.6–4.7	1.7 ± 0.8*	60–854	273 ± 24†
Midluteal	5.3–86.0	21.2 ± 3.2	82–1,251	354 ± 42†

Reference values are ranges (40), and measured values are means ± SD (n = 12); n = no. of participants. Significance level was set at P < 0.05.

^*Significantly different from the midluteal phase;

^†significantly different from the early-follicular phase.