Progesterone Test

Hi there,

I'm not sure if I'm ovulating or not - I have heard of Day 21 Progesterone test but wanted to check whether it should always be on day 21, even if you don't have a 28 day cycle? Or should it be 7 days before your next period? If you have irregular cycles then what's the best thing to do?

Our Expert's Answer

This information was published 7 years, 2 months ago and was correct at the time of publication. It may not reflect our current practices or regulations.

Please note that all the answers we give are on a generic basis only, as we cannot provide more in-depth answers without access to your medical history. If you need a more detailed response, tailored to you, we would recommend a consultation with one of our Fertility Specialists for more comprehensive medical advice.

I would advise you to use a home ovulation prediction kit and make careful records of the dates of your periods.  You should have the test for ovulation 7 days after ovulation.