False positive HCG window for Women on Pregnyl?

Does anyone know what the false positive window is for Urinary HCG tests on women taking pregnyl 1500iu. THe only info i can find seems to be about 3-5 days............False positive HCG window for Women on Pregnyl?
According to the information I could find (see sources section below), it could take up to a week. The first Web site says 7 days for 2500 IU, but both say it takes 7-14 days (depending on the dose), so I assume that it could still take a week even for the lower dose...False positive HCG window for Women on Pregnyl?
congratulations on your new found pregnancy

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im sorry i dont but try to search it further or talk to your doctor