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 10 years 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.