The best time to get pregnant is during the ovulation period. Ovulation occurs when a woman's egg is released from the ovary and is ready to be fertilized. If no conception occurs, the lining of the uterine will be shed, and that is when menstruation occurs. A woman's cycle is measured from Day One of the menstrual period until Day One of the next period. Ovulation can be estimated by calculating 12-16 days from the next expected period. You could also buy a Clearblue Fertility Monitor which helps you to identify up to 6 fertile days in each cycle.