The distributor reported an unspecified number of false negative results when testing patient samples using the hcg cassette rapid test, but was only able to provide information for one patient.The patient was tested as a screen prior to receiving a depo-provera injection for contraception.The patient tested negative on the hcg cassette rapid test and received the depo-provera injection.An unspecified urine pregnancy test was performed at another clinic 26 days later with a positive result.A quantitative blood hcg test was performed the following day with a result of 41,863 (units not specified), and the patient was diagnosed as pregnant.The patient's progesterone was determined to be low (5.8, units not specified); the patient was prescribed 200 mg progesterone per day.
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