A woman's menstrual cycle consists of dangerous and safe days. Dangerous and safe days are days on which conception can occur, and in which it is completely excluded. Many women are interested in the scheme for calculating dangerous days.
Instructions
Step 1
Knowing the day of ovulation is essential to determine which days of your cycle it is dangerous to have unprotected sex. During this period, a mature egg leaves the ovary and enters the uterus. The life span of the egg is approximately one day. If at this time she meets with a sperm, conception will take place. In order to identify the moment of the onset of ovulation, you should pay attention to the basal temperature (measured in the rectum), vaginal discharge and the position of the cervix.
Step 2
Measure your basal temperature every morning without getting out of bed. Insert the thermometer into the rectum by 5 cm. Take the readings after about 10 minutes. On ordinary days, the temperature does not exceed 37 degrees. The day before its rise is the date of ovulation.
Step 3
Pay attention to vaginal discharge. After menstruation, dryness is observed, after a few days, white or yellowish mucus appears. But closer to ovulation, it liquefies and turns into a watery transparent mass. After ovulation has passed, the discharge becomes thicker and less abundant.
Step 4
After your period, feel your cervix daily to determine its position. In its normal state, it is hard, flat and closed. But during ovulation, the cervix undergoes significant changes - it becomes soft, loose, and also rises and opens.
Step 5
Take the number that is the total duration of the menstrual cycle and subtract 11, then subtract 8. The resulting number will be the date of the first dangerous day. After that, add 8 to the resulting number and get the date of the last dangerous day. The central number of this interval is the date of ovulation. For example: cycle time is 28 days. Count: 28-11-8 = 9 (it turns out that the ninth day of the cycle is the first of the dangerous days). Then add: 9 + 8 = 17 (the seventeenth day of the cycle is the last of the dangerous ones). Now find the date of ovulation: 17-4 = 9 + 4 = 13 (the thirteenth day of the cycle is the most favorable for conception). The countdown of the duration of the cycle should be carried out from the first day of menstruation.
Step 6
Track the duration of at least six menstrual cycles (as most women have irregular cycles). Subtract 11 from the number of days in your longest cycle (you can subtract 8 to 11 days to be on the safe side). In this way, you will determine the last of the dangerous days in your menstrual cycle. Subtract 18 from the number of days in the shortest of your menstrual cycles (you can play it safe and subtract 19-21 days). This step will help you identify the first dangerous day in your cycle.
