How many days after your period do you ovulate?
Most people ovulate about 7 to 10 days after their period ends, but it depends on your cycle length. Ovulation usually happens 12 to 14 days before your next period, so with a 28-day cycle and a 5-day period, that's around day 14: about 9 days after bleeding stops. Shorter cycles bring it closer to your period.
How to work it out for your cycle
Ovulation is easier to count backwards from your next period than forwards from your last one. The time from ovulation to your period, the luteal phase, is usually 12 to 14 days. So:
- Take your usual cycle length (for example, 30 days).
- Subtract 14 to get your likely ovulation day (day 16).
- Subtract the number of days you bleed (for example, 5).
- The result is roughly how many days after your period you ovulate (about 11).
| Cycle length | Likely ovulation day | Days after a 5-day period |
|---|---|---|
| 24 days | Day 10 | About 5 |
| 26 days | Day 12 | About 7 |
| 28 days | Day 14 | About 9 |
| 30 days | Day 16 | About 11 |
| 32 days | Day 18 | About 13 |
| 35 days | Day 21 | About 16 |
Our ovulation calculator does this for you and shows the days around it.
Why the answer is a range, not a date
Ovulation day moves from cycle to cycle. In a study that measured ovulation with daily hormone tests, only about 30% of women had their fertile days entirely within days 10 to 17, and even women with regular cycles sometimes ovulated much earlier or later. In a large app study, the first half of the cycle averaged 16.9 days, with a wide spread from 10 to 30.
So treat any calculated day as a best guess. Real signs of ovulation narrow it down: stretchy, clear discharge, a positive LH test, a small temperature rise afterwards, or one-sided ovulation pain. See signs of ovulation.
Calendar estimates can't tell you a day is safe from pregnancy. If you don't want to get pregnant, use contraception. Lulu's fertile window is for understanding your cycle, not birth control.
What the days after your period feel like
The stretch between your period and ovulation is the follicular phase. Estrogen climbs, and many people notice better mood, more energy and more confidence as ovulation gets close. If you know when it's coming, it's a good time for the plans that take the most out of you.
When to talk to a doctor
See a doctor if your cycles are often shorter than 21 or longer than 35 days, if you have no signs of ovulation for several cycles, if ovulation pain is severe or lasts more than a day or two, or if you've been trying to conceive for 12 months (6 months if you're 35 or older).
Frequently asked questions
Can you ovulate right after your period?
Yes, with short cycles ovulation can come just a few days after bleeding stops. That's why pregnancy shortly after a period is possible.
Do you always ovulate 14 days after your period starts?
No. Day 14 is only typical for a 28-day cycle, and even then it varies. Count back about 14 days from your next expected period instead.
How long does ovulation last?
The egg lives about 12 to 24 hours after release, but your fertile window is about six days because sperm can survive up to five. See how long does ovulation last.
Can you ovulate twice in one cycle?
More than one egg can be released, but it happens within about a day, which is how non-identical twins form. You don't get two separate fertile windows weeks apart.
Sources
- Wilcox AJ, Dunson D, Baird DD. The timing of the fertile window in the menstrual cycle. BMJ (2000)
- Bull JR et al. Real-world menstrual cycle characteristics of more than 600,000 menstrual cycles. npj Digital Medicine (2019)
- Cleveland Clinic: Ovulation
- NHS: Fertility in the menstrual cycle
This page is for information only and isn鈥檛 medical advice. If something worries you, please talk to a doctor.
Keep reading
Ovulation calculator: when do I ovulate?Free ovulation calculator: enter your last period and cycle length to see your likely ovulation day for the next 4 cycles. Private, instant, estimates only.
When do you ovulate?When do you ovulate? Usually 12 to 14 days before your next period, not always on day 14. How to estimate it and the body signs that confirm it.
What are the signs of ovulation?Signs of ovulation: egg-white discharge, a positive LH test, a temperature rise, one-sided twinges and higher sex drive. What each means and how to read them.
What is the fertile window?The fertile window is the 6 days ending on ovulation day when pregnancy is possible. How to estimate yours, the best days, and why it moves each cycle.
Ovulation phase: signs, timing and feelingsThe ovulation phase explained: when you ovulate, how long it lasts, the signs and symptoms to look for, and why mood, energy and libido often peak.