Luteal Phase Length After Birth Control

2 Replies
Lin - December 2

So naturally I've been reading up a lot on everything I need to know about ttc. From what I've read, the luteal phase is supposed to be constant. Can anyone tell me for sure if this is an absolute, or is it possible for it to be different after going off birth control? I ask, because I'm pretty sure that I know when I ovulated, based on the cm, and I just went off birth control last month. If I did ovulate, then I should definitely have a period this month, right? If one ovulates, then menstruation must follow. Or is this not true? I want to be sure whether or not I can expect my luteal phase to be the same next month assuming I can determine it this month and, in addition, I'm trying to sort out when to expect AF. So if the luteal phase is definitely constant, then I'd think I should be able to approximate AF's arrival based on my ovulation date.

 

L - December 2

The average luteal phase is typically 14 days post ovulation. Not ovulating, a non ovulatory cyst, persistent CL or abnormal hormone levels can cause the perceived luteal phase to be longer than 14 days. Generally speaking, in a properly working situation, you can expect af 14 days post ovulation. However keep in mind that you can't be 100% positive about when you ovulate unless you have a P4 bloodtest 8 days post ovulation or an u/s immediately before AND after ovulation. A positive ovulation predictor test (OPK) can't guarantee that ovulation occurred.

 

Lin - December 2

Thanks for the reply! What about the egg-white cervical mucous? Is it possible to have that at another time of the cycle? If so, what my cause it? That's how I determined when I ovulated, not with an OPK. Again, thanks!

 

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