Are your periods coming closer together? A shorter menstrual cycle does not automatically mean infertility, but a persistent change is worth discussing with your healthcare provider.

Cycle length is counted from the first day of one period to the first day of the next. It is different from how many days you bleed.

How can shorter cycles relate to fertility?

• Ovulation may happen earlier, shifting your fertile window.
• Sometimes, shortening cycles can be associated with changes in ovarian reserve.
• A short cycle alone does not prove poor egg quality, low progesterone or difficulty conceiving.

What should you do?

Track your period dates, bleeding pattern and any ovulation-test results. Avoid assuming that ovulation always happens on day 14.

If you are trying to conceive and your cycles are consistently shorter than 25 days, seek advice early rather than waiting the usual 6–12 months. Also discuss bleeding between periods or a persistent change from your usual pattern.

Your healthcare provider can review your history and decide whether hormone testing or ultrasound is appropriate.

Cycle length is one part of the picture. Age, ovulation, sperm health and other reproductive factors also matter.