in both sexes, in-glaze pregnant passion is key to enjoy safety and security, it is more safe choice for the period of safety control. On the first day of
    
    

     menstrual periods come until the next day, the sign is a number of experienced menstrual cycle, generally is 26-35. Mature eggs from ovaries

     crisis safety

     via oviduct recan to the womb to experience a day or two, but this 48 hours seems too short.

contraceptive abortion: women are never chromatography of

     period BaiDai

     48 hours to pregnancy, but at this is not to say that two days to stop sex set, because the sperm is a tough clinging to the hunter, he entered the uterus to 72 hours after about can live for three days, so in order to avoid the uterus to sign the lurking just appear to have captured the hunter eggs, must move forward, after the crisis for insurance, will have five days before ovulation, after four days, even within days and then ovulation cylinder approximately 10 days to time is crisis. The key is to find the menstrual

     menstrual period, natural is safe period. [into safety period --

     pain to lock the crisis? Project: wonderful

     ovulation, usually after two days to the middle period, so the lock crisis is not that difficult, but to see how method. On the left to

     the middle days. Not complicated, it is OK to kindergarten level in arithmetic. If the shortest must have the longest period, reduce and menstrual cycle reduction by 11 would answer. If, for example, the menstrual cycle is 30-32 days, with 30-18 = 12,32-11 = 21, the crisis is 13-21 days. The days of the Red Cross, ready to fork TaoTao. If you see

    thermometers

     here refers to the night after wake up, not dream before any activities to base body temperature. From the first day to start on menstruation, every morning, didn't KISS before release to the thermometer in 5 minutes, then will be measured by dots temperature in square, don't dawdle, always remember to the next period before 1 day on to do so, all will be joined shop after curve. Ovulation temperature rise will occur in general by the former or to rise to high temperature, usually basis within 3 days too high for ovulation. This is an absolute

     menstrual cycle to

     Numbers, form will head, that you may have to change BaiDai. Usually, middle period, and the days before ovulation, clear as BaiDai becomes fresh and elastic and viscoelastic and became very long, have the longest filamentous drawing degrees day is probably ovulation, the day before and 4-5 days for the crisis. Because women have time

BaiDai ways children do arithmetic self-test] BaiDai "argument" common liuli

     conventional check, please note:  

     oulation outside environment, climate, I have emotional, stress, diseases, such as healthy exercise to many factors, so many months have calculated. General for six months, and identify the longest period and the shortest period, to have more reliable safety calculated.

     menstrual cycle does not rule, and the living environment and visit) women frequently change, long delay or early appear to ovulation, not a recommended security period contraception. For women, not

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