Some couples are surprised to learn that conception does not take place as a matter of course once they stop using contraceptive precautions. Stopping the pill or noy using a condom does not work as simply as just unlocking the door to let the sperm in to fertilize a waiting egg. The fact is that if you and your partner do not have any infertility problems, there will be approximately a 1 in 3 chance of becoming pregnant as a result of unprotected intercourse during the fertile phase of each cycle. Those women who do become pregnant without any medical assistance generally do so within 2 years of trying, 80% conceiving during the first year.