Contraception refers to the use of scientific methods to temporarily prevent women from becoming pregnant. It mainly controls the three stages of the reproductive process: inhibiting the occurrence of sperm and eggs, preventing the union of sperm and eggs. The uterine environment is not conducive to the acquisition and survival of sperm, or is not suitable for the implantation and development of fertilized eggs. Common contraceptive methods include contraceptive pills, condoms, contraceptive films, safe period contraception, extracorporeal ejaculation contraception, compressed urethral contraception, surgical contraception, etc.
How to choose the size of a condom
Condoms are currently the most commonly used contraceptive tool. The length of a regular contraceptive device is about 19 centimeters, with a seminal vesicle about 2 centimeters long at the distal end. There is a slightly loose rubber ring at the proximal opening (mouth) where semen is stored in the same room, which has a tightening effect on the penis.
What is the model of the condom? The specifications of condoms are divided into four types based on the size of the opening diameter: large, medium, small, and extra small. The opening diameter of 35mm is large, 33mm is medium (with a circumference of about 104mm and a width of about 52mm), 31mm is small, and 29mm is extra small.
At present, most condom models in China are medium, with a nominal width of 52 plus or minus 2 millimeters (half of the opening circumference of the condom) on the packaging. If you are looking for small products, you should look between Japanese or Korean products.
Teach you how to eat condoms correctly
1. To obtain a condom, the first step is to see the factory batch number printed on the packaging box. The factory batch number is usually represented by 6-8 digits, representing the year, month, day, and the batch number from left to right. Based on this, the production date can be obtained to calculate the validity period. The storage period at room temperature shall not exceed one and a half years. If the storage period is too long or the storage conditions are too poor, it will affect its tension and strength.
2. After the penis is erect, gently squeeze the seminal vesicle at the top of the condom to expel air from the sac, place it in the glans, use food, middle finger, and thumb pulp to push the folded part towards the base of the penis, and break it with your nails. Therefore, before using condoms for sexual intercourse, it is important to cut off your nails.
3. After ejaculation, the erect penis will soon become soft. Before the penis becomes soft, the man pinches the mouth of the condom and pulls it out together with the penis to prevent it from slipping off.
4. When a condom ruptures or slides, the woman immediately squats down and quickly discharges semen from the vagina. Then, 10 milliliters of vinegar are taken and placed in half a basin of warm water to clean the external genitalia and vagina. On the second day after inserting an external contraceptive pill, one contraceptive pill is taken orally for 53 days. Does the condom have any side effects for 3 consecutive days?