Table 2.

Menstrual cycle lengths and peak days. Eight participants were still in Cycle 0 and so did not contribute to the statistics in this table. Two participants did not have Cycle 0 data.

	Peak Day	Length	Luteal Phase
Cycle 0 (n = 10)	218.6 ± 65.9 (123–320)	223.8 ± 71.6 (125–320)	5.7 ± 2.7 (2–10)
Cycle 1 (n = 10)	25.4 ± 7.4 (12–36)	33.7 ± 7.4 (22–47)	8.2 ± 2.8 (4–12)
Cycle 2 (n = 8)	22.9 ± 5.4 (15–31)	32.5 ± 5.1 (25–42)	9.4 ±2.7 (6–13)
Cycle 3 (n = 8)	25.3 ± 6.0 (19–33)	35.0 ± 6.0 (28–45)	9.8 ± 2.7 (5–13)
Cycle 4 (n = 5)	18.0 ± 2.0 (15–20)	29.6 ± 3.0 (26–34)	11.6 ± 2.7 (7–14)
Cycle 5 (n = 4)	15.5 ± 2.4 (13–18)	26.8 ± 4.6 (22–33)	11.3 ± 2.6 (9–15)
Cycle 6 (n = 2)	17.0 ± 2.8 (15–19)	29.0 ± 2.8 (27–31)	12.0 ± 0 (12)