The Ovulation Calculator estimates the ovulation date and the corresponding due date if the pregnancy is based on normal biological cycles. It is not recommended to avoid pregnancy based on ovulation calculation.
|Most Probably*||Ovulation Window||Estimated Due Date if Pregnant|
|Sep 3, 2017||Aug 30, 2017 - Sep 9, 2017||May 28, 2018|
|Oct 1, 2017||Sep 27, 2017 - Oct 7, 2017||Jun 25, 2018|
|Oct 29, 2017||Oct 25, 2017 - Nov 4, 2017||Jul 23, 2018|
|Nov 26, 2017||Nov 22, 2017 - Dec 2, 2017||Aug 20, 2018|
|Dec 24, 2017||Dec 20, 2017 - Dec 30, 2017||Sep 17, 2018|
|Jan 21, 2018||Jan 17, 2018 - Jan 27, 2018||Oct 15, 2018|
* This date is based on the average of 14 days before the next period was due.
Ovulation is the process by which a mature ovarian follicle ruptures and discharges one or a few eggs in a female's menstrual cycle. This process is controlled by the brain via the release of the luteinizing hormone (LH) and the follicle-stimulating hormone (FSH). If the egg is fertilized by sperm, it may implant from 6 to 12 days later, at which point pregnancy begins.
The average ovulation time is 14 days before the first day of your next period. However, the ovulation day may vary among women. Therefore, cycle length alone is not a reliable indicator of your ovulation day. Ovulation tests are more accurate, having a 99% accuracy rate, and they can be purchased without a prescription.
Normally, ovulation test kits measure the LH level in urine. A surge of the LH level, or a "positive" test result indicates the onset of ovulation and the fertilization windows, which occur during the following three days.