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

Calculating Fertility Window: Increase Chances of Pregnancy with IVF

Ovulation Calculator & Calendar - Calculate your Most Fertile Days

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

Timing is Everything: Ovulation Strategies for Fertility Success, Naturopathic Medicine

How To Track Ovulation - Natalist

Ovulation Calculator & Calendar: Identify Your Fertile Days

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

Findings from a mobile application–based cohort are consistent with established knowledge of the menstrual cycle, fertile window, and conception - ScienceDirect

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

Fertile Window Calculation: Methods & Techniques

Assessment of menstrual health status and evolution through mobile apps for fertility awareness