Ovulation is the release of an egg from the ovary, when the egg reaches the fallopian tube it is ready to be fertilized. In order for pregnancy to occur the egg must be fertilized by sperm within 24 hours after its release. Immediately prior to ovulation the body produces a surge of Luteinizing hormone (LH) – this usually takes place in the middle of the menstrual cycle. LH triggers the release of the egg from the ovary. What are ovulation tests used for? Most people use ovulation tests to track ovulation so that they know when the best time is to try for a baby. Some people use ovulation testing as a natural form of contraception so that they know when to avoid sex. It is not a totally reliable form of contraception but is recommended by some religions opposed to contraception and is sometimes called the rhythm method.
