Abstract
Summary
1. In the adult castrate rat, oil injections of 19-nortestosterone cyclopentylpropionate produced decreases in urinary N excretion comparable with those obtained with testosterone propionate. 2. This compound caused greater retention of N than was observed with parenteral administration of methylandrostenediol or androstanolone when given at 1/8 the dose of the 2 latter compounds. 3. 19-nor testosterone cyclopentylpropionate in a single injection of 2 mg produced retention of N lasting several days; unesterified nortestosterone, similarly given, did not result in significant N retention.
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