kegg® is a medical-grade fertility tracking device that gives you accurate and personalized fertility tracking through cervical fluid in just 2 minutes a day. Gain unique insights into your fertility. See your full fertile window with kegg! One time purchase; no further cost for use. No refills, no subscription. Free access to an online private community, where kegg users share charts, success stories, tips and tricks. Plus user support specialists answering questions and providing kegg chart insights. Most women get pregnant from intercourse that did NOT occur on the day of the ovulation! kegg gives you the confidence that you will not miss the crucial first days of the fertile window.