Does the penis have to be fully penetrated in the vagina for the female to receive chlamydia?

She can still get it: During intimacy, penile secretions prior to ejaculation can harbor chlamydia, which (unless you are using a condom) can mix in with vaginal secretions present in and around the vagina. Therefore, you don't have to be fully penetrated into the vagina to transmit chlamydia.

No: It is very easy to spread this most common std. Here's good, reliable information. Have a test - get treatment if needed. It's treatable and a tragedy to ignore it. This is really a case of good news/ bad news. Be smart - and use protection for any sexual contact - it's smart and that's sexy! http://www.Cdc.Gov/std/chlamydia/stdfact-chlamydia.Htm.

No: All it takes is the tip. Get tested and treated.

Chlamydia is Sticky: Not necessarily. But, it is still unusual to get chlamydia without exposure to semen on the cervix.