What contraceptive technique is used to prevent pregnancy?

The barrier method is a form of contraception that prevents sperm from reaching the egg, thereby preventing pregnancy. This technique involves the use of physical devices or barriers, such as condoms or diaphragms, which create a physical obstruction. By blocking the sperm's ability to enter the uterus, the barrier method effectively reduces the likelihood of fertilization during sexual intercourse.

The barrier method is advantageous because it also offers protection against sexually transmitted infections (STIs), which is a critical consideration in sexual health. It is a widely accessible option, and it can be used in conjunction with other contraceptive methods for enhanced effectiveness.

Other methods listed, such as hormonal methods, withdrawal, and natural family planning, operate on different principles and may not provide the same immediate and direct prevention of sperm from reaching the egg as barrier methods do. Hormonal methods rely on hormonal regulation to inhibit ovulation, while the withdrawal method depends on timing and self-control to avoid ejaculation inside the vagina. Natural family planning involves tracking fertile and non-fertile periods, which requires significant understanding and compliance with the menstrual cycle. Each of these methods has its own benefits and limitations, but the barrier method distinctly stands out for its direct intervention in preventing sperm from fertilizing the egg.