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Hi Diana, OPK = Ovulation Predictor Kit It's used to detect LH surge. When near ovulation, there will be a LH surge which will be detected by OPK. There are some ppl selling at BP threads. Some blogshops selling too. Alternatively can get from gmarket as well. I know a website selling...

Hi ladies, I have some cheap OPK and HCG sticks to sell. They are in strips form and you will need to dip them in urine. PM me if you interested.

gals, If you wish to get opk or hcg test strips, you can checkout bbbumpshop(dot)blogspot(dot)com.

Dun give up Tigress, jiayou!