There are three standard chemical tests for diagnosing early pregnancy. All depend on the fact that the urine of gravid women contains hormones which affect certain animals when the urine is injected into them. All these tests are about 98% accurate.
This week a new kind of pregnancy test was announced. Dr. Frederick Howard Falls and two colleagues of the University of Illinois College of Medicine, after experiments on 600 pregnant and nonpregnant women, launched it in the American Journal of Obstetrics and Gynecology. The answer comes up in an hour or less (the...
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