Risks of Barrier Methods of Birth Control
Some risks come with barrier methods of birth control. With the use of condoms, especially when it is very tight, there might be a tear that allows precum or sperm to enter the vagina. Also, if the condom is slack, it might slide off during sexual intercourse too. Some people are allergic to condoms made of latex so they switch to polyurethane [4] or polyisoprene condoms [5] which are less effective.
The major component of most spermicides is nonoxynol-9. Some people are allergic to this substance and the reaction to this allergy might lead to painful swellings or sores around the genitals which increases the risk of contracting sexually transmitted diseases (STDs) from an infected partner.
The use of cervical caps or diaphragms increases the chance of urinary tract infections (UTI) [6]. It is not advisable to leave the cervical cap or diaphragm inside your vagina for a long period. As stated earlier, it should be placed in your vagina 6 hours before sex and be removed after sex. Staying longer than that can be detrimental.