Ch_11

Lecture Notes

Barrier methods are designed to physically keep sperm and egg from uniting. These methods of birth control have become increasingly popular because, in addition to preventing conception, they can reduce the risk of sexually transmitted infections. The effectiveness of all barrier methods is increased by the use of spermicides.

A condom (or male condom) is a thin, soft, flexible sheath of latex rubber, polyurethane, or processed animal tissue that fits over the erect penis to help prevent semen from being transmitted. Condoms prevent infections by covering the portals of entry and exit for many sexually transmitted infection organisms.

Condoms are the third most widely used form of birth control in the United States and are the preferred method of choice for adolescents due to their ease of use and easy accessibility and cost.

Latex condoms should be used with water-based lubricants (like K-Y Jelly) only because oil-based lubricants, such as Vaseline, can weaken the rubber.

Top right image: http://en.wikipedia.org/wiki/File:Real_nuvaring.jpg

Bottom right image:

http://sheller.com/practice-areas/practice-areas.php?title=nuvaring-contraceptive-device