Church & Dwight Co., Inc. today announced that it has obtained a favorable verdict in a patent infringement action against Abbott Laboratories in the U.S. District Court for the District of New Jersey. The case involved pregnancy tests marketed by Abbot Laboratories under its Fact Plus trademark.     The patents cover the familiar type of pregnancy tests that are sold over-the-counter at supermarkets, drug stores and mass merchandisers. Church & Dwight asserted that Abbott had infri...