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 18, 2015||Sep 14, 2015 - Sep 24, 2015||Jun 11, 2016|
|Oct 16, 2015||Oct 12, 2015 - Oct 22, 2015||Jul 9, 2016|
|Nov 12, 2015||Nov 8, 2015 - Nov 18, 2015||Aug 6, 2016|
|Dec 10, 2015||Dec 6, 2015 - Dec 16, 2015||Sep 3, 2016|
|Jan 7, 2016||Jan 3, 2016 - Jan 13, 2016||Oct 1, 2016|
|Feb 4, 2016||Jan 31, 2016 - Feb 10, 2016||Oct 29, 2016|
* 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.