BOSTON (AP) _ A federal jury today rejected a woman's claims she was injured by an intrauterine copper contraceptive made by G.D. Searle & Co., the 15th such victory for the Chicago pharmaceuticals maker.

The jury in U.S. District Judge Rya Zobel's court concluded that the Cu-7 device was not responsible for any alleged injury of the plaintiff, Cindy Nickerson. The jury also found in favor of the other defendant, Ortho Pharmaceuticals, manufacturer of the Lippes Loop intrauterine contraceptive.

''We are pleased that the Massachusetts jury was persuaded by the weight of science, the long history of safety and effectiveness, of the Cu-7 and the continuing endorsement of the product by the medical community,'' said William I. Greener Jr., Searle spokesman.

So far, 19 such cases have gone to a judge or jury, said Searle spokeswoman Kay Bruno.

''We've won 15 of the 19. Of the four losses, two are completed cases and two are on appeal,'' she said. ''Unfortunately, there are still cases pending against the company.''

Three years ago, Searle discontinued its IUD business in the United States citing what it called difficulty in getting product liability insurance and the cost of defending against suits.

''The product is still approved by the FDA as safe and effective when used by its label.'' Bruno said. ''While we have not been in the IUD market for three years now, we have said that we would vigorously defend this product.''

Searle, a wholly owned subsidiary of the Monsanto Co. is a research-based company that develops, manufactures and markets prescription phamarceuticals.