Flaw in many home pregnancy tests can return false negative results

Flaw in many home pregnancy tests can return false negative results

Pregnancy tests can sometimes give a false negative result to women several weeks into their pregnancies, according to research by Ann Gronowski, professor of pathology and immunology at the School of Medicine. Her findings led the FDA to change its standards for evaluating new pregnancy tests, but old tests with the false-negative problem are still on the market.
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