In fact, we all know that women will not ovulate during their safe period, so even unprotected sexual intercourse at this time will not lead to pregnancy. However, this does not mean that pregnancy will be 100% prevented during the safe period, because women's menstrual cycle and ovulation date will be affected by many factors. 1. The basic principle of the safe period contraceptive method is to avoid sexual intercourse in the so-called unsafe period before and after ovulation, so that the egg and sperm have no chance to meet. The reliability of this method varies among different women. Its success depends on knowing the exact date of ovulation. Safe period contraception is a contraceptive method that stops sexual intercourse during the ovulation period. 2. A normal adult woman only ovulates one egg per month. Ovulation date is generally about 14 days before the next menstrual period. After the egg is released from the ovary, it can survive in the fallopian tube for 1-2 days, waiting for fertilization; sperm can survive in the woman's reproductive tract for 2-3 days. Sexual intercourse in the days before and after the egg is released makes conception very likely. To be on the safe side, avoid "natural" sex 5 days before and 4 days after ovulation, as well as 10 days including the ovulation day. 3. In theory, it is not easy to get pregnant at other times except the days mentioned above, so it should be safe. This is called the safe period. However, such calculations also involve risks, because women's cycles are greatly affected by the environment and emotions, and will change when encountering special events. If the safe period is divided into two types in a fixed way, it will become unsafe. The safe period must be used in conjunction with several other methods to be truly safe. For example: calculating based on the menstrual cycle, measuring basal body temperature and observing cervical mucus secretion. 4. The safe period contraceptive method is used under normal sexual life. If it is not strictly controlled or used improperly, it can easily lead to failure. |
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