S sophijayy Member Joined May 31, 2011 Messages 6 Reaction score 0 May 31, 2011 #1 What on earth is an opk?
tinselcat Well-Known Member Joined Jan 18, 2011 Messages 4,247 Reaction score 0 May 31, 2011 #2 an ovulation prediction kit, helps you identify a day or two before that you are about to ovulate