Q&A: How do I detect ovulation if I have irregular periods?

In a woman who is regularly ovulating, ovulation generally occurs about two weeks before the onset of your period. So if your cycle lengths range between 27 and 32 days, the timing of ovulation will vary between day 13 and day 18 of your cycle.

These last two months are significantly different than your cycles before and indicate that something has changed. My suspicion is that you may not have ovulated during these last two months. Women who do not ovulate can have very short, very long, or irregular patterns to their cycles. A common occurrence that can temporarily disrupt ovulation in an otherwise normal woman is the development of an ovarian cyst. I would suggest that you follow up with your gynecologist for some blood tests and ultrasound to look at your ovaries.