The basics
How many days after ovulation do you get your period?
Your period usually starts about 12 to 14 days after ovulation. ACOG puts it at about 14 days in an average 28-day cycle, and says this stretch is the most consistent part of the cycle. A study of more than 600,000 cycles found it averaged about 12 days.
Why is the second half more predictable?
The part before ovulation, when an egg matures and estrogen rises, changes the most from cycle to cycle. The part after ovulation, when progesterone rises, is steadier. That is why a long or short cycle is usually mostly a long or short first half.
How can I work out when I ovulated?
Count back 12 to 14 days from the start of your next period. You can only do this once that period arrives, and the result is an estimate.
| Cycle length | Ovulation was roughly on cycle day |
|---|---|
| 24 days | 10 to 12 |
| 28 days | 14 to 16 |
| 32 days | 18 to 20 |
| 35 days | 21 to 23 |
Does a late period mean a late ovulation?
Often, yes. If the second half is steady, a later period usually means ovulation came later. But stress, illness and other things can change timing, so it isn’t certain.
Can I use this to avoid or plan pregnancy?
Not reliably. The fertile window starts several days before ovulation, and ovulation moves around. If you don’t want to get pregnant, use contraception.
Frequently asked questions
Is the luteal phase always 14 days?
No. The research average is about 12 days, with ACOG giving about 14 in a 28-day cycle. Yours may be a little different.
What if my cycle is 35 days long?
Your first half is probably longer. The second half can still be about the same length.
Does ovulation cause my period?
Ovulation is the release of an egg. If there is no pregnancy, hormones fall and the womb lining sheds. That is your period.
Sources
Seventh is a free period and cycle tracker for iPhone and iPad, by doogud. This article is general information, not medical advice. If something feels wrong, see a doctor.
