To detect this tiny change, women must use a basal body thermometer. Usually a woman's basal body temperature rises by only 0.4 to 0.8 degrees Fahrenheit. The rise in temperature can be a sudden jump or a gradual climb over a few days. After ovulation most women have an oral temperature between 97 and 99 degrees Fahrenheit. Anywhere from 96 to 98 degrees Fahrenheit orally is average before ovulation. So by recording this temperature daily for several months, you'll be able to predict your most fertile days.īasal body temperature differs slightly from woman to woman. A woman's basal body temperature rises slightly with ovulation. What is the basal body temperature method of determining fertility?īasal body temperature is your temperature at rest as soon as you awake in the morning. This method always should be used along with other fertility awareness methods, especially if your cycles are not always the same length. The time between the two Xs is your most fertile window. Draw an X through this date on your calendar. Take this new number and count ahead that many days from the first day of your next period. To find out the last day when you are most fertile, subtract 11 from the total number of days in your longest cycle. The X marks the first day you're likely to be fertile. To find out the first day when you are most fertile, subtract 18 from the total number of days in your shortest cycle. Using this record, you can find the days you are most fertile in the months ahead: So write down the total number of days it lasts each time. The length of your cycle may vary from month to month. To get an even more accurate idea of when you, personally, are most fertile, you can record your menstrual cycle on a calendar for eight to 12 months. Our tool above is a simplified and automated version of the calendar method of determining fertility. Most women deliver within a two week period before or after their anticipated due date.įor use with IVF, IUI, HCG Trigger, LH Surge, Embryo Transfer.What is the calendar method of determining fertility? Pregnancy due dates are not precise, but rather an estimation of the day a woman might be expected to give birth. Due dates can also be calculated using the embryo transfer date or date of insemination. If an ovulation kit was used to detect LH surge, the ovulation date should be used to determine the expected due date. If a baby was conceived by natural conception, the estimated due date is determined by the first day of the mother’s last normal menstrual period. For the best results, use the most accurate data available. The Due Date Calculator app is appropriate for use in women with a history of infertility as well as those who conceived naturally. Results will indicate the date of the last menstrual period (LMP), estimated due date, gestational age of the baby and likely date of conception. Next, using the “Select Date” menu, enter the appropriate date and press calculate. View the options in the dropdown menu under “Calculate Pregnancy By” header and make your selection. Due date information may also be calculated using the date of ovulation. The app calculates the pregnancy due date for women who have undergone fertility treatment including embryo transfer, IUI and egg retrieval. The Due Date Calculator app is a fertility-specific pregnancy due date calculator designed primarily for physician use.
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