There is a microscope with which you can detect ur ovulation date correctly. Its basically a saliva test which u can perform daily to know ur ovulating. N it can be unlimited times. So no worries of going to dollar store or any store to buy ovulation kit. I saw tat microscope was available in amazon.
Learn to chart your cycle
Buy ovulation kits!! They help predict your peak high fertility days (your most fertile days), me and my husband are expecting our 7th child. Our last four were helped conceived by using an ovulation kit!!!