workay75,
To figure out how long your cycles are, you count the first day of a period as day one, and the last day is the day before the next cycle begins. Ovulation usually occurs around the middle of your cycle, so for example if you have a 28 day cycle ovulation occurs somewhere around the 14th day. As the egg is only viable for 24 hours, sperm can live for up to 3 days once ejaculated. There have been cases of sperm living up to 7 days. This means that the best time to get pregnant is 3 days before ovulation, and for 24 hours after. Even if you have a regular cycle, the day of ovulation can vary, and though rare, some women can ovulate more than once during a cycle. Generally, there is no completely safe time that you can't get pregnant. There are many ways you can track your cycle. You can purchase a basal thermometer, which will show a spike in temperature when you are ovulating. You can also keep track of your cervical mucus, which will become clear and stringy when you are ovulating. Some women also use an ovulation microscope that shows ferning when you are ovulating. You can also use a combination of these methods, in addition to using software that will not only keep track of your cycles, but also tell you when the optimum time is.
I recommend femta at www.femta.com and ovusoft at www.ovusoft.com
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