When Will I ovulate if I have a cycle 31 days?

My partner and I have been trying to concieve (conceive) for about three months but I can't tell my ouvulation date because my period comes at different times of the month but I'm normally on a 31 day cycle could someone tell me when is my ovulation date please.

[Heather5]

Well, since most women have a luteal phase (from ovulation until AF) of 12-16 days, you probably ovulate between cycle day 15 and 19. Most likely on day 16, 17 or 18. Good luck to you!!!

[clomidkid]

Hi. I have a 31 day cycle each month and ovulate on either day 17,18 or 19,my gp told me to subtract 14 from 31. We've been ttc for 5 years,ivf is our next step. I'm taking clomid fertility drugs and we have been diagnosed with unexplained infertility. Let me know how u get on and good luck,clomidkid x

[maybebaby29]

You  can play with the numbers of cycles and find out the date: http://www.babycenter.com/ovulation-calculator

[kindergal]

Buy some OPK sticks and monitor yourself---I always ovulated on Day 17/18 with a 30/31 day cycle.

[luvkayln]

I have a 31 day cycle and i ovulate on cd 18. Buy opks and monitor yourself to be sure...everyone is different. My LP is 14 days long, your may be longer or shorter. Good luck!

[PrincessMJ03]

A related discussion, Ovulation was started.