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. Author manuscript; available in PMC: 2021 Aug 13.
Published in final edited form as: Psychoneuroendocrinology. 2020 Oct 13;123:104895. doi: 10.1016/j.psyneuen.2020.104895

Table 1c.

Overview of phasing procedures for broad phases.

Phasing Procedure for broad phases (Use with Extreme Caution)
Luteal Follicular
Hormonal Status and Definitions Complex: rising and high E2/P4, withdrawal of E2/P4 Complex: falling and low E2/P4, rising E2
Counting Methods Day −15 until day −1 before menstrual onset Day 1 of menstrual onset until day−15 before menstrual onset
LH-Test Definitions Day following positive test until menstrual onset Day of menstrual onset until the day following positive test
BBT Definitions Day following nadir until menstrual onset Day of menstrual onset until the day following nadir

Note. The numbering of the different methods in a cycle phase column ranks suitable methods for determining this cycle phase, with (1) being gold standard. See text for further explanation. N/A=not applicable.