Audiogram An audiogram is a graph that shows the audible threshold for standardized frequencies as measured by an audiometer. The Y axis represents intensity measured in decibels and the X axis represents frequency measured in hertz. The threshold of hearing is plotted relative to a standardised curve that represents 'normal' hearing, in dB(HL).
Test every 12 hours not every 24 hours. The perfect time for sexual intercourse is within 12-24 hours prior to the ovulation predictor FIRST turning positive. Especially if you test only once a day. This may sound like a surprise, but making love only after first getting a positive OPK may not get you pregnant at all.
This is where ovulation predictor kits (OPKs) can help. An OPK is a quick, easy and accurate way to predict ovulation in advance. It allows you to pinpoint your fertile window from the very first month. Kits are available online, at some chemists or medical stores that also stock pregnancy test kits. Urine-based OPKs test your urine for an increase (surge) in luteinising hormone (LH). This happens one day to two days before ovulation. A small amount of LH is always present in your blood and urine.