The timing of the “fertile window” in the menstrual cycle: day

Illustration of FAM based on a hypothetical 28-day menstrual cycle

Pulse Rate Measurement During Sleep Using Wearable Sensors, and its Correlation with the Menstrual Cycle Phases, A Prospective Observational Study

How Long Does Ovulation Last? Finding Your Fertile Days

When Does Ovulation Occur? Calculate the Best Time to Conceive.

Self-identification of the clinical fertile window and the ovulation period - ScienceDirect

Menstrual Cycle - Embryology

(Open Access) Variability in the Phases of the Menstrual Cycle (2006), Richard J. Fehring

Luteal phase: length, symptoms and how to calculate

Ovulation Calculator: Know what is the best time to get pregnant

Real-world menstrual cycle characteristics of more than 600,000 menstrual cycles

Assessment of Menstrual Health Status and Evolution through Mobile Apps for Fertility Awareness

Calculating Your Monthly Fertility Window

How Your Energy Levels Change on Your Menstrual Cycle

Ovulation Calculator: Track Your Fertile Days