Preclinical study

A study to test a drug, a procedure, or another medical treatment in animals. The aim of a preclinical study is to collect data in support of the safety of the new treatment. Preclinical studies are required before clinical trials in humans can be started.

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    Unusually early development of intellectual powers, speech, physical traits, and so on.

  • Precocious puberty

    The onset of secondary sexual characteristics, such as breast buds in girls, growth of the penis and thinning of the scrotum in boys, and the appearance of pubic hair in both sexes, before the normal age of puberty.

  • Preconceptual counselling

    The interchange of information prior to pregnancy. Usually for pregnancy planning and care, but sometimes in the form of genetic counseling. See also genetic counseling.

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    Forerunner. That which precedes or is derived from an available source. The term “precursor” is applied to an inactive substance converted to an active one (such as an enzyme, vitamin, or hormone). The term “precursor” applies to any chemical that is transformed into another. From the Latin “praecursor,” composed of “prae-” (or pre-), before + […]

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