You should be able to test about a day or so before AF shows up. There are predictor calculators online, found one that tells you when you should O, when AF show show & the first day you can test. Just do a basic search. GL!
Look up Ovulation calculator
Connect with CafeMom:
Switch to Mobile Site
Getting Started Guide
Frequently Asked Questions
Part of the CafeMom family of sites
© 2014 CMI Marketing, Inc. All rights reserved.