Silly Question

Tiffany

Ok ladies, hubby and I are doing our first <a href="https://glowing.com/glow-fertility-program">IUI</a> this month. Doctor has us doing 2.5mg Letrozole CD 3-7. Here’s my question...I discovered I started my period tonight at 11:45pm. Does that count as CD 1 or since it was that close to midnight, do I count the next full day as CD 1?

Silly question, but I’m honestly not sure how to count it and how big of a difference it may make. Help!