Quidel Corp. (NASDAQ:QDEL) on Thursday said it has receivedFDA clearance to market its one-step test that predictsovulation with a few drops of a woman's urine. The San Diegocompany's test gives results in three minutes. It is the first of aset of new rapid immunodiagnostics that the company isdeveloping for the fields of fertility, allergy and infectiousdisease. The stock closed Thursday at $5, up 25 cents.

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