I am proud to calculate the ovulation period and have safe contraception

The method of calculating safe contraception during the ovulation period starts from the first day of the next menstrual period. The countdown to 14 days or minus 14 days is the ovulation day. The ovulation day and the 5 days before and 4 days after the addition are called the ovulation period. This is the theoretical basis for the safe period contraceptive method. For example big black ass dildo fucking , if a woman's menstrual cycle is 28 days butts , the first day of this menstrual cycle is December 2, then the next menstrual cycle is December 30 (December 2 plus 28 days). If you subtract 14 days from December 30, December 16 will be the day of ovulation. The ovulation period is from December 11 to 20, as well as the 5 days before and 4 days after the ovulation day. Except for menstruation and ovulation, all other times are safe periods. Use the basic body temperature measurement method to measure the ovulation period. Record the basic body temperature measured every day on a body temperature record sheet and connect it into a curve. You can see that the body temperature is low in the first half of menstruation, and the body temperature rises in the second half of menstruation. This low body temperature curve before and after high body temperature is called a biphasic body temperature curve huge anal dildo , indicating that the ovary is ovulating, and ovulation generally occurs before the body temperature rises or during the process of rising from low to high.
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