Day 1 · Menstrual phase
Cycle day 1: what is happening and how to plan it
Day 1 is the first day of full menstrual flow. Hormones at cycle minimum, energy low, prostaglandins peak. Here is what to schedule and what to skip.
Read day 1 →What is happening today.
Day-by-day reference for the menstrual cycle. Hormones, energy, what to schedule, what to skip. Anchored to a 28-day reference cycle; adjust to your own length using the cycle phase calculator.
Day 5 · Menstrual phase
Cycle day 5: energy returning, what to schedule
Day 5 is typically the last bleeding day or first post-period day. Estrogen begins to rise. Mood and focus start lifting. A practical day-5 plan.
Read day 5 →Day 10 · Follicular phase
Cycle day 10: peak follicular energy and how to use it
Day 10 sits in the late follicular window. Estrogen climbs, BDNF rises, openness to new work peaks. Best use of a day-10 work block.
Read day 10 →Day 14 · Ovulatory phase
Cycle day 14: ovulation, peak performance, fertile window
Day 14 is the classic ovulation day on a 28-day cycle. Estrogen peaks, LH surges, verbal fluency is measurably higher. What to do, what to know.
Read day 14 →Day 17 · Luteal phase
Cycle day 17: early luteal, detail-orientation peak
Day 17 sits in early luteal phase. Progesterone rises, estrogen drops, calm focus and editing capacity peak. The right work to schedule on day 17.
Read day 17 →Day 21 · Luteal phase
Cycle day 21: mid-luteal symptoms and how to manage them
Day 21 is mid-luteal. Progesterone is high, body temperature is up, early PMS symptoms can appear. What is normal, what to do.
Read day 21 →Day 25 · Luteal phase
Cycle day 25: late luteal, PMS onset, demand reduction
Day 25 is late luteal. Serotonin and allopregnanolone drop, PMS symptoms peak for many. A practical demand-reduction plan for day 25.
Read day 25 →Day 28 · Luteal phase
Cycle day 28: pre-period, what is happening and what comes next
Day 28 is the last cycle day on a 28-day cycle. Estrogen and progesterone fall sharply, period imminent. What to expect physically and mentally.
Read day 28 →