The contraceptive principle of emergency contraceptive

Understanding the principle of contraception for newlyweds to understand the principle of contraception is very important for family planning. Contraception is a scientific method that couples do not want to have children for the time being and do not affect sex. Because all kinds of contraceptive methods are different, so the contraceptive principle is also different. The following is to talk about the contraceptive principles of different methods for readers' reference. First, the contraceptive principle of oral contraceptive and contraceptive injections for women. Because female oral contraceptive and contraceptive injections contain estrogen and progesterone, they have the following four effects: 1, inhibit ovarian ovulation. After the woman is sexually mature, an egg is discharged from the ovary every month, which is carried out under the interaction and control of the hypothalamus, pituitary and ovary. The hypothalamus secretes a substance called gonadotropin-releasing hormone, which acts on the pituitary gland and causes the pituitary gland to secrete a substance called gonadotropin, under which the follicles in the ovary mature and expel the eggs. and secrete estrogen and progesterone. The estrogen and progesterone produced by the ovaries in turn act on the hypothalamic pituitary gland, affecting their secretory function. When the ovary secretes more estrogen and progesterone, it inhibits or reduces the secretion of gonadotropin by the pituitary gland through the hypothalamus. When gonadotropins are suppressed or reduced, the follicles in the ovaries do not mature and ovulate. Because oral contraceptive and contraceptive injections contain estrogen and progesterone, the two hormones in the body increase and inhibit the secretion of gonadotropin-releasing hormone in the hypothalamus, so the gonadotropin secreted by the pituitary is also suppressed. it also inhibits the development and maturation of follicles and ovulation, playing a contraceptive role. After stopping the drug, the ovaries quickly resumed ovulation. 2. Change the shape of endometrium. The endometrium also periodically changes its shape during the menstrual cycle. When it is affected by estrogen and progesterone, the glands of the endometrium proliferate, the spiral artery grows, and the whole endometrium thickens, which is nutritious and convenient for the implantation of fertilized eggs. But after taking contraceptive or injecting birth control, the endometrium is thinner, less glandular, and secreted poorly. This dysplastic endometrium cannot accept the implantation of fertilized eggs, so it will not get pregnant. 3. Change the nature of cervical mucus. The mucus of the cervix also changes with the menstrual cycle. At the beginning of menstruation, there is not much estrogen in the body and a small amount of cervical mucus. When ovulating quickly, the estrogen in the body increases and produces more mucus, which is thin and transparent, which is conducive to the passage and protection of refined vitality. After ovulation, under the influence of progesterone secreted by the ovary, the mucus secreted by the cervix becomes sticky and opaque, which is not conducive to sperm passage. Progesterone in oral contraceptive or contraceptive injections can make the mucus secreted by cervical glands sticky, not conducive to the passage of essence, and can play a role in contraception. 4. Change the normal peristalsis of fallopian tube. Estrogen in oral contraceptive and contraceptive injection can accelerate the movement of fallopian tube. Progesterone has a certain effect on the cilia and secretory cells of tubal epithelium, which makes the fertilized egg move faster in the fallopian tube. When the fertilized egg reaches the uterus, the development of the endometrium is not mature controller vibrator , which is not conducive to the implantation of fertilized eggs. First, the contraceptive principle of oral contraceptive gossypol in men. Gossypol can inhibit the production and maturation of sperm, resulting in the lack of a sufficient number of healthy sperm in semen, so as to achieve the purpose of contraception. Second, the contraceptive principle of uterine ring. The uterus, such as metal birth control ring and plastic birth control ring, can change the environment in the uterine cavity, so that fertilized eggs can not be implanted. Third, the contraceptive principle of contraceptives. Contraceptive tools such as female vaginal diaphragm and male condoms can prevent sperm from entering the vagina or uterine cavity, thus achieving the purpose of contraception. Fourth, there is a contraceptive principle of drugs in the vagina. Vaginal use of drugs such as contraceptive ointment, contraceptive pills, contraceptive suppositories, contraceptive membranes, etc., can kill sperm, thus playing a role in contraception. The harm of Emergency contraceptive when unplanned pregnancy is gradually becoming an "obstacle" to mutual love, when the pain and aftereffects of abortion surgery quietly cast a shadow on women's hearts, more and more women ignore this point: pay at the same time. Really know how to protect yourself. Therefore, women must catch up on this lesson: to find the healthiest form of contraception is to truly love yourself. The abuse of emergency contraceptive does great harm as a remedial measure. People usually use emergency contraceptive to avoid pregnancy without using contraception, condom rupture, miscalculation of safety period, etc., but now many women lack contraceptive knowledge. Use emergency contraceptive as a routine contraceptive method, or use emergency contraceptive many times. However, it is extremely harmful to do so. Due to the high dose of emergency contraceptive (the dose of emergency contraception is usually equivalent to 8 days of conventional short-acting oral contraceptives), excessive or frequent use will cause menstrual disorders and affect your health. In addition anal dildo , the effective rate of emergency contraception was significantly lower than that of conventional contraception. The contraceptive success rate of conventional contraceptive is more than 90%, while that of emergency contraceptive is only 70% and 80%. Experts in an interview with the Life Times said: "Emergency contraceptive should not be misused, usually should be taken within 72 hours after sex, more than 72 hours of high failure rate." Moreover, some women now eat three or four times a month, or even seven or eight times, messing up their menstruation. " Traditional contraceptive methods are unreliable in addition to taking drugs my old ass , there are also some traditional contraceptive methods, such as calculating the safe period or extracorporeal ovulation. Young people's sex life is irregular, and the ability of self-control is poor, generally speaking, it is not recommended to use traditional methods. Take the safe period calculation method as an example, as long as the menstruation is slightly irregular, it is difficult to calculate which day to ovulate. In addition, in the process of sexual intercourse, even if there is no ejaculation, there will be a small number of sperm with the prostatic fluid into the vagina, easy to cause pregnancy, so the way of in vitro ejaculation is not scientific. According to the survey data of the World Health Organization, a large number of clinical data confirm that the higher the frequency of the use of traditional contraceptive methods, the higher the risk of unintended pregnancy. If you put the IUD, whether with medicine or copper, the higher the proportion, the lower the chance of abortion. Return to healthy contraceptive methods it is understood that more than 1 of China's induced abortion women are unmarried and 50% have never had a child. When you are pregnant, you have to have an abortion, which is actually indiscreet, using conventional contraceptive methods to protect yourself. Among the existing conventional contraceptive methods, there is a large category of intrauterine birth control system, which can not only use contraception, but also treat dysmenorrhea, endometriosis and so on. As long as it is placed in the uterine cavity, it can have a long-term contraceptive effect, and the success rate of contraception is more than 90%, but it should be followed up regularly. IUD is suitable for women who are not ready to conceive within three or five years and have a single sexual partner. The utilization rate is very high in our country male masturbators , with 45% of married women using it. At present, the more representative in China is the German Xianling Manyue, which contains slow-release progesterone, the texture is very soft, but also can prevent pelvic inflammation, the treatment of dysmenorrhea, menorrhagia and so on. (the copper-containing IUD does not have the effect of treating dysmenorrhea.) it is also easy to use and can be operated by a doctor with one hand. Taking short-acting oral contraceptive is also a scientific and high-quality routine method of contraception. It is suitable for young women, especially those who have not had children, to prevent accidental pregnancy. The modern short-acting oral contraceptive hormone dose is very small, as long as it is taken regularly, it can inhibit ovulation and prevent pregnancy, and its effective rate can reach 99%. Oral contraceptive can also treat dysmenorrhea, menstrual volume, irregular menstruation, short menstruation, anemia, and prevent endometrial cancer, ovarian cancer and so on. Some modern oral contraceptive also have anti-male effects, can reduce the hair on the body and make the skin smooth, especially for acne. In addition, for women who do not plan to have children in the short term, short-term oral contraceptive is also a good choice, after the next menstruation can be pregnant, high safety. Experts advise female friends that if they find it troublesome to take medicine at a fixed time every day, they might as well put the tablets in the toothbrushing cup so that they can think of taking medicine when brushing their teeth every day. Taking contraceptive orally will not gain weight, the website of the British journal Nature reported that American researchers have conducted an in-depth analysis of the 44 most common contraceptive and birth control patches on the market over the past few years. The results showed that there was no evidence of any association between contraceptive use and weight gain. According to reports, contraceptive contains synthetic estrogen and progesterone, which will not affect fat metabolism. After long-term, large-scale clinical observation, it was found that the average weight of women who used oral contraceptive did not increase significantly. Therefore, weight gain after using oral contraceptive is not common, and there is no need to worry too much. If there is an increase in appetite and weight gain in the process of using oral contraceptive, you can also consider discontinuing the use of oral contraceptive and using other methods of contraception. But it should be noted that there may be many reasons for this weight gain, such as women of childbearing age due to endocrine effects, even if they do not take contraceptive may gain weight.
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