30 day cycle... ovulation day??

[ChloeL934]

I have been having 30 day cycle, just been to the doctors who wants to do ovulation blood, she said if my cycle is 30 days take 7 days away which makes it day 23 to do the bloods, but online it says my ovulation day would be day 16 can someone help please? Xx

[LizzieBW]

Hi Chloe,

I noticed your post & know a fair bit about ovulation because I was tracking for years so didn't want to read & run.

Your GP would usually do a "21 day bloods" on a normal 28 day cycle because doing the blood test 7 days into an average 14 day luteal phase (the time between ovulation & period) will be a good indication of whether you have ovulated or not. Since your cycle is 30 days this would make sense, your GP has chosen a day 23ish blood test. You likely ovulate anywhere between day 16 and 20 on a 30 day cycle.

Hope this helps a little xx

[ChloeL934 in reply to LizzieBW]

thank you. So I still go on day 23 to get the bloods done? Xx

[LizzieBW in reply to ChloeL934]

Yes, don't worry - that makes complete sense, based on your cycle length. So because your cycle is considered 2 days longer than "average" you've been advised to have your blood test 2 days later than the standard day 21 bloods 👍xx

[DianeArnold Partner Nurse Fertility Network UK]

Hi Chloe. The ovulation blood test is known as a Day 21 progesterone test. This relates to a 28 day cycle. If your cycle is a regular 30 days, then it makes sense to test on a Day 23. The result should read more than 30 to prove ovulation has occurred that month. Good luck! Diane

[ChloeL934 in reply to DianeArnold]

Thank you. I hope so xx

[Elynn]

Trust your Dr. I presume shes doing a 21 day progesterone test. Adding 2 days for 30 day cycle is correct. Shes got this. Google can be confusing, on this occasion, step away 😀

[ChloeL934 in reply to Elynn]

Thank you - I know, I should trust her. I’m a chronic over thinker doesn’t help haha xx

[Trying1234]

You doctors advise sounds right to me as I was advised the same thing as I have a longer cycle too.

[ChloeL934 in reply to Trying1234]

Thank you xx