To check the ovulation period, a common method is to estimate the "fertile window" which includes the day of ovulation and the five days prior. Ovulation generally occurs about 14 days before the start of the next menstrual period in a typical 28-day cycle. Here are steps to check ovulation:

1. Track your menstrual cycle length for several months to determine the average.
2. Use an ovulation calculator by entering the first day of your last period and your average cycle length.
3. The calculator estimates your fertile window by counting back 14 days from the expected start of your next period.
4. Additional signs of ovulation include changes in cervical mucus (becomes clear and stretchy), a slight rise in basal body temperature, and sometimes mild pelvic pain.
5. Ovulation predictor kits that test for luteinizing hormone (LH) surge in urine can help detect ovulation about 24-36 hours before it occurs.

The fertile window is the best time for conception if trying to get pregnant. If cycles are irregular, tracking symptoms and using ovulation kits may offer better insights. This approach combines calendar calculations, body signs, and testing for a more accurate understanding of ovulation timing.