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Pos opk on one brand but neg on another with same urine sample?
I've been ttc for almost a year using cheap pound shop opks which show up I've ovulated every month. This time I used them again but also tesco ones just to see out of curiosity. Anyway I got a beaming pos for two days in a row on the tesco but the cheap ones are still completely negative. Not even a feint line. I tried another cheap batch and those too are neg. Is it possible tesco ones are faulty or are the cheap ones not very accurate?
1 Answer • 7 years ago
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Pregnancy test calculator
Use this calculator to help you decide when to take your first home pregnancy test.
Answers
The same as pregnancy tests they pick up different sensitivity. you may find that the ‘test’ line on regular 30 mIU sticks never seems to get as dark as or darker than the ‘control’ line or she doesn’t get a ‘test’ line at all. This means that the increase of LH in her body never reached the level that is considered ‘normal’ when the surge took place. In this scenario, you should try the higher sensitivity tests (20 mIU) as this will pick up the LH surge at much lower levels. This will be the best ovulation test in this case. This is why i waste my money on clearblue ones so i can be sure.
7 years ago
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