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.
What I am wondering is how long after exposure a PPD would give a pertinent positive/negative so I can schedule the doc appointment for that time, if its an immunological test it should take some until my immune system is primed I'm just missing the clinical picture of when it is primed. Thanks. Mar 13, 2009. #1.