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Conception

When's the best time to get pregnant? Use our interactive ovulation calculator to work out when you're most fertile and most likely to conceive.

What does a long leutal phase suggest?

2 replies

helz879 · 03/01/2026 15:45

Hi everyone, I was wondering if anyone could give me any advice on what having a long leutal phase means? I’m currently on CD 41 and my cycles vary between 33-45 days. According to CB and Premom I ovulated CD 15 this cycle but again this can vary between CD15 and 18. It means my leutal phase is usually at least 17 days + this cycle is 26 days long and counting. I’m not pregnant sadly either! Any advice would be appreciated! Thanks x

OP posts:
HelloDarknessmyoldfrenemy · 03/01/2026 19:04

Long luteal phases are rare in my understanding? Long follicular phases are much more common.

Did you definitely ovulate? Are you tracking ovulation with temperature testing? I don’t find the clear blue tests very accurate. Have you had the EWCM?

My guess would be that you didn’t ovulate on day 15 and ovulated later/ are still to ovulate. Sometimes your body can try to ovulate but not manage it and then try again a few weeks later which maybe what has happened to you?

Day 15 is just when the average women will ovulate but that doesn’t sound like the app has adjusted to your longer cycles yet. For me, I have around 60 day cycles, but just have a long follicular phase, I ovulate around day 45 and then have a period 14 days later.

Sorry for the really long answer, hope some of it might be helpful

clementmarot · 16/02/2026 09:01

I appreciate this is an older thread but as you didn't get many answers I thought I'd chip in. I agree with the previous poster that you are probably wrong about your ovulation date unless it was confirmed by temperature tracking. It's possible to have a pre-ovulatory "surge" of hormones and then not actually ovulate, then it happens again later in your cycle and you do actually ovulate. My cycles used to be very often like this when I was younger and the only way to be sure is to take your temperature every morning, because the temperature going up and staying up confirms that you have ovulated rather than picking up the "preparing to ovulate" signs which can happen more than once. Having said that, when I was younger I did also always have a long luteal phase, usually 16 days. I believe anything longer than 16 days is very unusual if you get beyond 17 days of confirmed high temps you are almost always pregnant. (Though of course it's possible for a pregnancy to fail very early on, giving what looks like a luteal phase of 17 or 18 days, for example this happened to me a few times.) People tend not to talk much about having a longer-than-usual luteal phase because it doesn't cause any fertility probs except for potentially making you think you've missed your period when you haven't yet and if anything it's probably an advantage.

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