as soon as you want to. While the egg is likely to be released sometime in the next 24-36 hours. The sperm will live for a couple of days and will be present when the egg is released.
surge. A positive does not mean that you are gauranteed to ovulate....just that you are LIKELY To ovulate in the next 24-36 hours. Charting BBT is a great way to determine if you are, in fact, ovulating and exactly when in your cycle you do. Many women use a combination of OPK's and BBT charting to find their most fertile days. Good luck!