Yahoo Racing is powered by Motorsport Network, providing expert reporting, analysis, and insider access across the world’s top racing series. A normal menstrual cycle lasts between 21 and 35 days.

Understanding how your menstrual cycle works will improve your chances of successfully getting pregnant — or avoiding pregnancy — depending on your goal. It’s important to know when ovulation occurs ...

When you're trying to become pregnant, understanding when in your cycle you're the most fertile is key to success. Dr. Rebecca Flyckt, medical director of University Hospitals Fertility Center in ...