Ovulation Calculation

If you are trying to get pregnant by calculating ovulation using BBT charting or LH test sticks to find out when you're likely to ovulate, you should know that they may not be helping you to maximize your most fertile days.

If you are trying to calculate ovulation, the graph below depicts what a woman’s probability of conception is on the days before, during, and after ovulation. It may be surprising to find that the highest probability of conception occurs with intercourse on the days before ovulation, rather than the day of ovulation itself.^2,3

According to a 2001 report in Statistics in Medicine, the day of ovulation holds only a 5% chance of conception, but the four days before hold a cumulative 80% chance of conceiving.3 These new findings demonstrate that a woman’s highest probability of conception is on the 4-5 days before ovulation. This time period is commonly called the fertility window. The Fertility Window is the time period during your monthly menstrual cycle in during which sexual intercourse can lead to a conception. In studies that were conducted at university based hospitals, it has been shown that the probability of conception is highest on the 4 days before ovulation, as sperm can remain alive inside a woman's body for at least 5 days⁴ . In fact, in some rare circumstances they may even stay alive for as long as 6 or 7 days.

Ovulation Calculation & Fertility Window

Through the identification of the Fertility Window, you have defined a maximal period of time available to you whereby you and your partner can plan multiple attempts to conceive during the cycle. In this way, your cumulative probability of a successful conception can be maximized. By having intercourse during the 4 days before pregnancy, you can double your chances of pregnancy.

The OV-Watch detects the chloride surge 3 days prior to the estrogen surge, 4 days prior to the LH surge and 5 days prior to ovulation, making it an earlier predictor of ovulation than any other chemical surge during the month. For women trying to conceive, knowing the days before ovulation not only lowers the stress level for her and her partner, but it increases her chances of getting pregnant.

Nearly 66% more pregnancies are estimated to occur by month 6 with OV-Watch over urinary LH kits.14 By maximizing your most fertile days with OV-Watch, you can increase your chances of pregnancy and get pregnant sooner. Learn more about ovulation calculation by reading our FAQs.

BACK