There are also unsafe situations during the safe period of contraception, and there are misconceptions about contraceptive failure

Many people believe that contraception is absolutely safe during the safe period for women, but in reality, if this is not done, changes during the safe period will become less safe and accidents may occur.

My good friend Ning Ning is a physician. After graduation, she went to another hospital, but we didn't reduce our contact. We went shopping together on weekends until she got married.

She is very happy all day when she gets married and rarely contacts me. Until one late night, she suddenly called me and her tone was very strange, mute, as if she had just cried, refusing to ask any questions.

I can only get up and rush to her new home.

Her teacher Tie Qing opened my face and upon entering, Ning Ning had already turned into tears. Seeing me, I cried even more suffocating and said, 'I may be pregnant, blame him!'! It turns out that's the case. I temporarily let go and asked them what happened. I only found out after asking, Ning Ning has been feeling unwell recently, dizzy, and taking a lot of medicine. Today, she realized she was pregnant! This baby is also difficult to protect. Because I took a lot of medicine. I think it's strange that Ning Ning is a doctor herself, why didn't she know she was pregnant?

Ning Ning sobbed and told me that her husband had a business trip not long ago. Coincidentally, while he was on a business trip, she had a period of absence. When he returned, his period had just ended and he had not taken any contraceptive measures. Because how to calculate, the day when his period had just ended should be safe. At this moment, Ning Ning's husband intervened and said, "I'm not afraid of your jokes. I'm afraid Ning Ning will suffer, so I must take measures. But Ning Ning insists that it's okay, she's a doctor, and she's never wrong. So I listened to her words, but in the end, alas..." Ning Ning became even more angry: I'm not doing this for you! I always say condoms are like taking a shower in a raincoat, not even on wedding night, I'm not doing it to make you feel better

The story of Ning Ning is not a fiction, nor is it an accident. Many women prefer to use a combination of safety period calculation and condoms to prevent pregnancy, thinking it's safe, but in fact, doing so is not safe at all. It is not uncommon for Ning Ning to experience additional ovulation due to excessive excitement at the end of her menstrual cycle due to a breakup with her teacher.

Most women have a menstrual cycle of 24-32 days and an ovulation period of 12-18 days. If the eggs cannot be fertilized 24 hours after ovulation, the eggs will die. After sperm is discharged, the egg can generally be fertilized within three days, but there are also reports that the sperm still retains the ability to fertilize after one week of sexual activity. The safety period is very short. For women with a menstrual cycle of 28 days, ovulation usually occurs around the 14th day of their menstrual cycle. The 7th day before ovulation is not safe, except for the 5th day of menstruation and the 6th to 7th day of menstruation. This is the first safety period, and the 4th day after ovulation is also a dangerous stage. Therefore, the 19th to 28th day of menstruation is relatively safe, which is called the second safety period. Therefore, for women who have menstruation once every 28 days, The safe period for menstrual cycles is only about 10 days. In addition, due to changes in climate, diet, emotions, environment, etc., the timing of ovulation also changes, and excess ovulation also occurs. Therefore, the method of contraception during the safe period is completely unreliable. Ning Ning is a typical example of the first safe pregnancy.