This study will compare different combinations of fertility signs (cervical mucus (CM), luteinizing hormone \[LH\], pregnanediol glucuronide \[PDG\], and basal body temperature \[BBT\]) to determine which are most reliable for identifying ovulation and luteal phase length. Thirty existing Premom App users will track daily observations for three menstrual cycles. Participants will record mucus, perform urine tests, upload test strip photos to the Premom App, and measure BBT. Both participant readings and AI-assisted app readings will be analyzed. The main goal is to find which marker pairings give the most accurate picture of ovulation timing and luteal phase length. Secondary goals include understanding ease of use, the number of tests required, and whether the app improves accuracy.
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Agreement Between Marker Combinations and the Estimated Day of Ovulation (EDO)
Timeframe: Through completion of each menstrual cycle (cycle length up to 35 days), over 3 consecutive cycles per participant
Luteal Phase Length Determined by Different Fertility Marker Combinations
Timeframe: Daily tracking through completion of each menstrual cycle (cycle length up to 35 days), over 3 consecutive cycles per participant.