Table 5.

Prospective and Retrospective Identification of Menstrual Subphases by Different Recommended Methodologies

Methodology	Identification of Subphase
	Menses	Early Follicular	Mid-Follicular	Late Follicular	Ovulation	Early Luteal	Mid-Luteal	Late Luteal
Option #1: Sonography	P	P	P	P	P	P	P	P
Option #2: Self-Report of Onset of Menses, Urinary LH Testing, and Sex Hormone Measurement	P	P	R	R	P	P	R	R
Option #3: Self-Report of Onset of Menses and Sex Hormone Measurement	P	P	R	R	R	R	R	R
Option #4: Self-Report of Onset of Menses and Urinary LH Testing	P	P	?	?	P	P	?	?
Option #5: Self-Report of Onset of Menses and Basal-Body Temperature	P	P	?	?	R	P	?	?
Option #6: Self-Report of Onset of Menses	P	P	-	-	-	-	-	-

Key: P = Accurate Prospective identification, R = Accurate Retrospective identification, ? = Questionable identification, - = Identification not possible