28 Days Cycle Ovulation Day
This calculator gives approximate ovulation dates and fertile times for women who have regular periods.
28 days cycle ovulation day. Unfortunately very few women have cycles of a consistent length. Menstrual periods are different from woman to woman and month to month. This means that the fertile days in a 28 day sample cycle lie between the 8th day and the 18th day. If your average menstrual cycle is 28 days you ovulate around day 14 and your most fertile days are days 12 13 and 14.
Ovulation occurs about midway through your cycle. Therefore if you have an average cycle of 28 days you would ovulate around day 14. This is based on a 28 day cycle length and a 14 day luteal phase. Ovulation happens about 14 days before your period starts.
If your average menstrual cycle is 35 days ovulation happens around day 21 and your most fertile days are days 19 20 and 21. Ovulation occurs once every menstrual cycle about 14 days before the next period. Sperm can survive 3 to 5 days. The egg itself can survive about 12 to 18 hours.
The last day is the day before the next period begins. In a 28 day cycle for example ovulation occurs between the 13th and the 17th day. If your cycle is 28 days long your next period should start 28 days from the first day of your last period your fertile window includes the day you ovulate and the five days before but keep in mind that you re much more likely to get pregnant during the last three days of this time frame. If your cycle or luteal phase is different than the average you re better off counting backward 14 days from the next projected period.
For example if your cycle is 30 days long you would ovulate 16 days after your period begins. The average person s menstrual cycle is between 28 and 32 days. So if you normally have a 28 day cycle ovulation should occur about day 14 although it s common for it to occur a few days before or after. If your luteal phase is shorter than 12 days no matter how long your cycle is your cycle will be an infertile cycle.
Some people have shorter cycles while others have much longer ones. If your cycle last an average of. The first day of a person s period is considered the first. Being aware of your menstrual cycle will help determine when your ovulation takes place.