Definition: A pregainer is a type of contraceptive device that is placed into the uterus during pregnancy to prevent the implantation of an embryo or fetus. It is typically inserted through a small hole in the cervix, which is then sealed with a gelatinous material called a "pregnant sealant." The purpose of this device is to prevent the development and implantation of any embryos or fetuses into the uterus during pregnancy. Pregainers are commonly used in assisted reproductive technology (ART) programs where
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