Oh, yes. All the signs are there. We really are the most amazing creatures, we women! =) I've even used it when nursing a baby. You have three fertility signs: cervical mucus, temperature and the shape and position of the cervix. With some practice you can read these signs quite easily, and when you combine them with knowing how long the egg and sperm are viable, you end up with a pretty reliable method. Of course it does require some abstinence, so it helps if you are in a committed relationship, but it seems so worth it when you consider how gruesome the alternatives are! There is plenty of info available. You can search for Billings Method or Natural Family Planning. And Andreas is right...I have read some horror stories about vasectomies! Remember the body will continue to make semen and sperm...where do they go??