A period calculator uses the length of your previous cycles to determine when your next menstrual cycle will begin. By monitoring your menstrual history, you can calculate your expected period dates and fertile window.
What is a Period Calculator, and How Does it Work?
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Dr. Prachi Benara
MBBS (Gold Medalist), MS (OBG), DNB (OBG), PG Diploma in Reproductive and Sexual health
16+ Years of experience