Diagnostic pregnancy tests in patients treated with tranquillizers.

may result from or be the cause of amenorrhoea, and in either case may lead to severe anxiety or more serious psychological illness. D-lusions of pregnancy, with or without signs of pseudopregnancy, are not uncommon, and are a further source of confusion. Diagnosis of pi egnancy may be impossible by physical examination alone for the first few weeks after conception, and speed may be important if serious psychiatric breakdown is to be prevented or therapeutic abortion contemplated. In these cases, therefore, reliance may be placed upon laboratory pregnancy tests. In the past these depended upon the detection of increased chorionic gonadotrophic activity in urine