Researchers discover how embryo sticks to wall of uterus at start of pregnancy AP Worldstream | January 16, 2003| | . Provided by ProQuest LLC. (Hide copyright information) Copyright

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Dateline: WASHINGTON In research that may lead both to new types of contraceptives and to new ways to treat infertility, scientists have identified molecules that help embryos stick to the wall of the uterus, an essential step in a successful pregnancy.

By analyzing carbohydrate molecules on the surface of the uterus during different times of the female cycle and by identifying a protein, called L-selectin, on the surface of the embryo, researchers at the University of California, San Francisco, learned for the first time how the embryo sticks to the wall of the uterus.

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