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| | A form of the hormone progesterone that is made in the laboratory and used to prevent pregnancy. It is being studied in the prevention of ovarian and endometrial cancer, and in the treatment of other conditions. Plan B is a type of oral contraceptive. Also called L-norgestrel and levonorgestrel. |
| Previous Definitions: | placebo, placebo therapy, placebo-controlled, placenta, placental blood transplantation | | Next Definitions: | plant sterol, plaque, plaque radiotherapy, plasma, plasma cell |
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