I did test for ovulation ..on 16th got dark line in ovulation kit, after 16th I also did test on 17th and 18th and I also got lines that one is light than 16th date test. I heard about that only one day we will get the two lines but I was getting after 16th also, so my question is that what will be the ovulation day, I am little bit confused in this. can you please tell me what is the right date for the ovaluating? This is the attachment of 16th,17th and 18th date .top to bottom