Hello and welcome to the zero to finals podcast.

My name is Tom and in this episode I'm going to be talking to you about barrier methods of contraception.

And you can find written notes on this topic at zero to finals.com slash barrier methods

or in the contraception section of the zero to finals obstetrics and gynecology book.

So let's get straight into it.

Barrier methods of contraception provide a physical barrier to semen entering the uterus and

causing pregnancy.

Barrier methods are the only method of contraception that help protect

against sexually transmitted infections. They're not 100% effective for either contraception

or preventing sexually transmitted infections. Let's start by talking about condoms.

Condoms are about 98% effective with perfect use,

but they can be significantly less effective with typical use at around 82%.

Standard condoms are made of latex.

Using oil-based lubricants can damage latex condoms and make it more likely that they'll tear.

Polyurethane condoms can be used in latex allergy.

Next let's talk about diaphragms and cervical caps.

Diophams and cervical caps are silicone cups that fit over the cervix and prevent

semen from entering the uterus. The woman fits the diaphragm or the cervical cap before having

sex and leaves them in place for at least six hours after sex. They should also be used with spermicide gel to further reduce the risk of pregnancy.

When used perfectly with spermicide, diaphragms and cervical caps are around 95% effective at preventing

pregnancy.

They offer little protection against sexually transmitted infections,

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