How to prevent pregnancy

It is best to take emergency contraceptive measures within 72 hours after sexual intercourse. You can take emergency contraception for 2 hours on an empty stomach, so the contraceptive rate will be high. See the instructions for details.

A word of caution: the longer the time, the worse the effect of taking birth control pills.

First of all, talk about contraceptives:

1, the harm of frequent use of emergency contraception

Today, with the increasingly open concept of sex, contraception has become a part of people's daily life. Because some couples are not used to using contraceptives, they have scruples about taking oral contraceptives for a long time. Buying convenient and effective emergency contraceptives has become an after-the-fact remedy, and even some women take emergency contraceptives for a long time to avoid contraception. Emergency contraception is not chewing gum, so you can't eat it casually. Frequent use of emergency contraceptives will do great harm to your health. Repeated use of emergency contraception in a short period of time will lead to serious endocrine disorders, menstrual disorders, prolonged menstruation and other symptoms. In addition, frequent use of emergency contraception will reduce vaginal secretions, not only reduce the resistance to foreign bacteria, but also easily lead to gynecological diseases such as vaginitis and pelvic inflammatory disease, and also reduce the lubricity of vagina and affect the quality of sexual life; In addition, it may also cause irreparable functional damage to reproductive organs such as fallopian tubes and ovaries, leading to habitual abortion and abnormal fetal development, which seriously affects fertility.

Emergency contraception is not 100% effective. If it is used improperly or the drug fails, it will also cause contraceptive failure. Observe the normal menstrual period and extend it for a few days. If there is no menstruation, it is recommended to go to the hospital for examination.

2. How to use short-acting contraceptives?

Although there are several kinds of short-acting contraceptives, they are taken in exactly the same way, that is, from the first day to the fifth day of menstruation (never from the fifth day after menstruation), take 1 tablet every night for 22 consecutive days. In case you lose your clothes, you should make them up in time the next morning. You can take the medicine naturally 1 to 3 days after stopping taking the medicine, and start taking the medicine on the fifth day for the next week. If you still can't take the medicine for 7 days after stopping taking the medicine, you should also start taking the medicine for the next cycle. If you can't menstruate for 3 months in a row, you should stop taking drugs and use other contraceptive measures, otherwise you may get pregnant once ovulation resumes. If you are not pregnant after ovulation, the endometrium will fall off and menstruation will occur. In other words, ovulation occurs before menstruation, and if no measures are taken, you may get pregnant before menstruation.

Step 3 give an example

Take Yu Ting as an example. Let's talk about its disadvantages first:

1) The probability of emergency contraception making follicles infertile is only 75%.

(that is, there is a 1/3 chance of getting pregnant)

2) After taking it, it can cause menstrual disorder in that month.

3) Continuous use can lead to lifelong infertility.

So this medicine does more harm than good, that is, it does more harm than good.

Second, standardize the use of pregnancy test sticks, and the test is negative, indicating that you are not pregnant. Under normal circumstances, the accuracy of pregnancy test stick is above 90%, and morning urine is more accurate. It is recommended that you observe closely, and the test can only be accurate after 7 days of menstruation. After menstruation is delayed for one week, it is recommended that you go to the hospital for blood HCG, B-ultrasound and other related tests to confirm whether you are pregnant.

Third, early pregnancy test paper self-test early pregnancy Although this method is the simplest and most convenient way to judge whether you are pregnant. Its mechanism is the qualitative determination of human chorionic gonadotropin (HCG) in urine. However, in order to get accurate results, it is necessary to pay attention to these matters.

1, detection time. Because HCG usually appears in the urine a few days after the fertilized egg is implanted, and it can only be detected when it reaches a certain amount. Therefore, for women with normal menstruation, HCG can only be detected in urine after menstruation is delayed. Women with long menstrual cycle or abnormal ovulation can only be detected after 40-44 days of menopause. And even if your menstruation is delayed now, it is less than a week, so it is impossible to detect whether you are pregnant.

2, urine dilution. If the urine is diluted by drinking too much water, it may lead to false negative results.

Doing experiments in the morning and evening may have some influence on the results. Morning urine generally has the highest HCG value, so many instructions recommend morning testing, but this is not absolute.

4. Pay attention to the length of urine immersion test paper when testing. Sometimes the length of urine immersion test paper is too long, which may make the test results difficult to judge.

Don't judge whether you are pregnant by the test results, if you are pregnant recently. Because HCG can be positive for a long time after termination of pregnancy (after delivery, spontaneous abortion and induced abortion).

6. Some diseases and drugs may lead to false positive results. Some tumor cells, such as hydatidiform mole, choriocarcinoma, bronchial carcinoma and renal carcinoma, can also secrete HCG.

7. Don't use expired test paper. Because the chemical reagent will be invalid after a long time, you should pay attention to the production date when buying it.

8. Don't use wet test paper.

To get the correct results, it is best to do early pregnancy test paper when menstruation is delayed for two weeks. If the test result is negative, menstruation will still come after 1 week, and the early pregnancy test paper should be made again.