Day 26 of the menstrual cycle
In short: what happens on day 26?
Day 26 of the menstrual cycle is when progesterone falls sharply and your period is about 2 days away. The blood vessels that feed the uterine lining begin to constrict, and the prostaglandins released during this process can cause premenstrual cramps and lower back pain as your body prepares for bleeding.
Day 26 of the menstrual cycle – animated explainer
Day 26: cycle dial, uterus and ovaries, hormone levels (illustrative animation).
What the animation shows
- FSH
- Follicle-stimulating hormone: starts the growth of follicles in the ovary
- LH
- Luteinising hormone: its sudden surge triggers ovulation
- E2
- Oestrogen (oestradiol): thickens the lining of the uterus
- P4
- Progesterone: prepares the uterus for a possible pregnancy
- BBT
- Thermometer and dots below: basal body temperature
- RING
- Coloured ring: the 28-day cycle and its phases; the green arc marks the fertile days
- MM
- The measurement in the uterus shows lining thickness; in the ovary it shows follicle or corpus luteum size
Phase
Luteal phase
Chance of pregnancy
Very low
Uterine lining
13 mm
Corpus luteum
15 mm
FSH
27
LH
16
Oestrogen
29
Basal body temperature
36.65°C
What is happening in your body today?
The corpus luteum has largely stopped working. The uterine lining prepares to shed.
Hormones
Progesterone and oestrogen are low; FSH starts to rise as the body prepares for a new cycle.
How you might feel
Lower abdominal cramps, back pain, bloating, poor sleep and emotional sensitivity may increase.
Chance of pregnancy
The chance of pregnancy is very low.
Tips for today
- A warm shower and a gentle tummy massage ease cramps
- Cut down on caffeine
- Eat magnesium-rich foods
When to see a doctor
See your doctor if your premenstrual pain gets worse every month or if you have pain during sex (this may be endometriosis).
Menstrual cycle day by day: table
| Day | What happens | Fertile window |
|---|---|---|
| Day 1 | First Day of Your Period | — |
| Day 2 | Heaviest Bleeding Day | — |
| Day 3 | FSH Rises, Follicles Grow | — |
| Day 4 | Bleeding Eases, Oestrogen Rises | — |
| Day 5 | Last Day of Your Period | — |
| Day 6 | Follicular Phase Begins | — |
| Day 7 | Dominant Follicle Is Selected | — |
| Day 8 | Oestrogen Rises, Fertile Window Nears | Low |
| Day 9 | Fertile Window Begins | Moderate |
| Day 10 | Fertile Window, Higher Pregnancy Odds | Moderate |
| Day 11 | 3 Days Before Ovulation | High |
| Day 12 | Oestrogen Nears Its Peak | High |
| Day 13 | LH Surge: Ovulation Is Near | Highest |
| Day 14 | Ovulation Day | Highest |
| Day 15 | Luteal Phase Begins | Moderate |
| Day 16 | Progesterone Rises | Low |
| Day 17 | Luteal Phase and Increased Appetite | — |
| Day 18 | Breast Tenderness May Start | — |
| Day 19 | Implantation Window Opens | — |
| Day 20 | Implantation Bleeding Possible | — |
| Day 21 | Progesterone Peak (Day 21 Test) | — |
| Day 22 | Mid-Luteal Phase | — |
| Day 23 | PMS Symptoms May Start | — |
| Day 24 | Hormones Start to Fall | — |
| Day 25 | Late Luteal Phase and PMS | — |
| Day 26 | Progesterone Drop and Cramps | — |
| Day 27 | 1 Day Before Your Period | — |
| Day 28 | Last Day of Your Cycle | — |
Frequently asked questions
Why do you get cramps before your period?
Prostaglandins released as progesterone falls make the muscles of the uterus contract, causing cramps.
Could I be pregnant on day 26 of my cycle?
If you are pregnant, symptoms at this stage feel similar to PMS. For a definite answer, take a test once your period is late.
What are the symptoms of endometriosis?
Common symptoms include period pain that gets worse over time, pain during sex, chronic pelvic pain and difficulty getting pregnant.
Gynaecology check-ups and follow-up at SoftCare Clinic
Book an appointment with our specialist doctors for irregular periods, painful periods or pregnancy planning.
The information on this page is general guidance based on a typical 28-day cycle and does not replace a medical examination. It should not be used as a method of contraception.
Medical content editor: Op. Dr. Şükrü Sanus