My husband and I want to have a baby. I have been on birth control for 7 years, and have regular periods. How long to wait until we can start trying?

One cycle. I usually recommend one spontaneous cycle after discontinuing contraception. Then monitor cycle length while trying for pregnancy. A preconception consult with your ob/gyn is also recommended to ensure optimizing your health, medications, diet and vaccinations to get your pregnancy off to a great start.