Fertile Window Courtney Updated April 02, 2018 03:27 Follow Fertile window: The days during a cycle in which it is possible to conceive. It includes several days leading up to and following ovulation. Related articles First 5 Days Rule When and how often should I have sex? Charting Basics - Trying to Conceive Avoiding Pregnancy in Irregular Cycles Trying To Get Pregnant? Comments 2 comments Sort by Date Votes gakiikibs February 22, 2016 16:08 Does KY jelly affect conception? 0 Permalink Alessa Hernandez June 26, 2016 03:08 I've hear it does, it is not recommendable to use lubricants if you are trying to conceive , I have been told to use sperm friendly lubricants such as preseed or TTC lubricant you can find them at Walgreens or CVS 0 Permalink Please sign in to leave a comment.