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. 2018 Apr 3;6:98. doi: 10.3389/fpubh.2018.00098

Table 4.

Predicted most fertile days in relation to cycle length/temperature rise.

	Reference cycle 1		Most fertile days
	Temperature rise	Cycle length	Beginning	End
Reference	14	25	10	14
Natural Cycles^a			14	17
Ovy^a			12	17

	Reference cycle 2		Most fertile days
	Temperature rise	Cycle length	Beginning	End

Reference	19	32	16	19
Natural Cycles^a			13	16
Ovy^a			13	18

	Reference cycle 3		Most fertile days
	Temperature rise	Cycle length	Beginning	End

Reference	22	31	17	22
Natural Cycles^a			14	17
Ovy^a			9	14

^aA previous cycle length of 30 days was stated by demand of the app. Before entering the first cycle.