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|
|Jan 1, 2015||Dec 28, 2014 - Jan 7, 2015||Sep 25, 2015|
|Jan 29, 2015||Jan 25, 2015 - Feb 4, 2015||Oct 23, 2015|
|Feb 26, 2015||Feb 22, 2015 - Mar 4, 2015||Nov 20, 2015|
|Mar 26, 2015||Mar 22, 2015 - Apr 1, 2015||Dec 18, 2015|
|Apr 23, 2015||Apr 19, 2015 - Apr 29, 2015||Jan 15, 2016|
|May 21, 2015||May 17, 2015 - May 27, 2015||Feb 12, 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.