TABLE 2.

Experiment protocol of order^a and treatment group on the interval time between two visits and the number of participants.

	OT group (N = 31)			PLC group (N = 31)			Interval time		Numberb
	N	Mean days	SE	N	Mean days	SE	Group	Order
Order A. 1L-2F	18	28.67	12.31	12	36.42	15.61	F = 0.010	F = 2.821	χ2 = 2.325
Order B. 1F-2L	13	29.38	20.64	19	22.42	13.20	p = 0.921	p = 0.098	p = 0.204

^aWomen participants completed two equivalent experimental sessions once during their fertile phase and once during their luteal phase, i.e., Order A. 1L-2F: the first experiment in luteal phase and the second experiment in fertile phase, and Order B. 1F-2L: the first experiment in fertile phase and the second experiment in luteal phase. Interval time refers to days between two experiments.

^bChi-square crosstab test (2 treatment group × 2 order) on the number of participants. Fisher’s exact test, two-sided exact significance at the level of p < 0.05.