What is the pregnancy cycle chart? The pregnancy cycle chart is a tool for calculating a woman\’s ovulation period and predicting the next menstrual period. It can provide important information and guidance to women who want to become pregnant, helping them track and manage their fertility cycles, accurately predict ovulation time and chances of conception, thereby improving the success rate of pregnancy. The pregnancy cycle chart usually contains the predicted date of menstruation, the predicted date of ovulation, and the final date of pregnancy.