Four methods of contraception are unreliable. Ten kinds of women should not eat contraceptive.

Healthy men have about 40 million sperm per ejaculation, while women have only one egg. With the probability of hitting 1 in 40 million realistic dildo , the success rate is self-evident. However, when "love" is strong, some people are so desperate.

For people who have no birth plans for the time being, in addition to the above characteristics, "love" also lurks the danger of "human life". According to a survey of contraception for young people, only 23% of respondents said they knew clearly about contraception, while 77% of respondents did not know or were confused about contraception.

Up to 55% of the respondents thought that the external body was a safe way of contraception, and 23% thought that the safe period was a safe way of contraception. Both of these are contraceptive methods with poor reliability and easy to cause accidental pregnancy. In addition, 54% of Chinese respondents said they had had unprotected sex.

One of the most unreliable-in vitro ejaculation contraception

In vitro ejaculation method refers to sexual intercourse, when the man will have a sense of ejaculation, that is, before ejaculation, the penis will be extracted from the vagina in time, the semen will be ejected to the outside of the vagina, so that the sperm can not meet the egg, so as to achieve the purpose of contraception.

Disadvantage one: ejaculation and ejaculation is a coherent action, the interval between the two is very short, most men can not accurately grasp the opportunity, so that when the most exciting part of sex is about to reach, the penis can not be extracted from the vagina in time, so that the semen initially ejected into the woman's vagina, and the number of sperm in this part of semen is the most, so it is easy to lead to pregnancy.

Disadvantage 2: men often have a small amount of sperm into the vagina before ejaculation occurs chastity cages , and the sperm at this time are sperm accumulated in the vas deferens. In the process of sexual excitement, along with the contraction of the vas deferens, the sperm will be discharged into the urethra first and then overflow into the vagina with urethral secretions.

Disadvantage 3: timely extraction of the penis from the vagina requires the man to master the "heat"just right", which makes both men and women nervous because they pay too much attention to the time of ejaculation, so that the process of sexual intercourse is not satisfactory, and over time it may even cause sexual neurasthenia.

The second most unreliable-- safe period contraception

Safe period contraception means to calculate the period during which a woman is not pregnant according to the ovulation period and the survival time of sperm and eggs in the female reproductive tract, and choose to have unprotected sexual intercourse during this period, so as to achieve the purpose of contraception.

Generally speaking, eggs can survive for 1-2 days after ovulation, and sperm can survive for 2-3 days in the female reproductive tract. Therefore, 2-3 days before ovulation and 1-2 natural intercourse after ovulation, it is possible to conceive. This period is called easy pregnancy.

Ovarian ovulation is generally within 2 days before and after 14 days of menstruation, so the safe period is about 10 days after menstruation, and 20 days after menstruation to the next menstruation. The nearer the menstrual period, the greater the possibility of contraception.

However, this calculation can not be accurate every time, because the time of ovulation is affected by the external environment, climate, mood, health and other factors, resulting in delayed or early ovulation, and additional ovulation may occur. In addition, there is no final conclusion on the maximum survival time of sperm and eggs in the female reproductive tract, so the safety period cannot be calculated accurately, so safe period contraception is not safe.

The third most unreliable-- Emergency contraceptive contraception

Emergency contraceptive is more convenient to use, as long as it is taken within 72 hours in the same room, a more satisfactory effect can be achieved. Emergency contraceptive is a hormone that thickens cervical mucus in a short period of time, hinders the combination of sperm and eggs, and makes it difficult for fertilized eggs to implant lesbian vibrator , leading to the purpose of contraception.

It needs to be emphasized that emergency contraceptive is an ex post facto remedy, and its stimulation to the reproductive system is short and strong. If used frequently, it is easy to cause hormone levels disorders in the body, and even affect future fertility.

Experts made it clear that emergency contraceptive can only be used once a month, otherwise it may lead to endocrine dysfunction. no, no, no. Therefore, emergency contraceptive should not be used as a routine method of contraception.

The fourth most unreliable method-- vaginal cleaning and contraception

Vaginal cleaning contraception means that women wash their vaginas with water or other liquids immediately after sexual intercourse to wash away semen from the body so as to avoid pregnancy. This method is not reliable because the scope of washing is only for the vagina, but many sperm may have reached the cervix and uterus before washing.

What's more, many women wash their vaginas with highly corrosive lotions such as disinfectants after sexual intercourse, thinking that they can "kill" sperm so as to achieve the purpose of contraception. In fact, there is no scientific basis for this method, and more importantly, it is dangerous. If the concentration of the lotion is poor, it may not only be unable to use contraception, but may also lead to vaginal burns or inflammation.

These women should not eat contraceptive.

1. Women with acute and chronic hepatitis and nephritis should not take it. Because contraceptive entering the body is metabolized in the liver and excreted through the kidneys, if used by women with acute and chronic hepatitis and nephritis, it will increase the burden on the liver and kidneys.

2. People with heart disease or cardiac dysfunction should not use it. The estrogen in contraceptive can retain water, sodium and other substances in the body, which will increase the burden on the heart.

3. It is not suitable for women with high blood pressure. A small number of women will raise their blood pressure after taking the medicine.

4. It is not suitable for patients with diabetes and family history of diabetes. As a result of taking contraceptive male chastity cages , blood sugar may increase slightly, so that recessive diabetes becomes dominant, so it will have an adverse effect on women with diabetes.

For women with hyperthyroidism, it is best not to use contraceptive until it is cured.

6. Patients with benign breast tumors, uterine fibroids and various malignant tumors should not be used to avoid adverse effects on the tumor.

7. Those who suffer from vascular embolic diseases (such as cerebral thrombosis, myocardial infarction, vasculitis, etc.) should not be used. The estrogen in contraceptive & Johnson may increase the clotting of the blood and aggravate cardiovascular disease.

8. Women with chronic headaches, especially migraines and vascular headaches, should not use it, otherwise it will aggravate the symptoms.

9. For those who have experienced little in the past, it is best not to use it. Long-term use of contraceptive can make the endometrium atrophy, but also reduce menstruation.

10, contraceptive can reduce milk secretion, and reduce the quality of milk, but also into the milk, breast-feeding have a negative impact, so lactation women should not use.
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