HCG is human chorionic gonadotropin hormone secreted by corpus luteum and placenta to maintain the fetal viability. It is secreted in the urine of pregnant women. Detection of this hormone in urine or serum is an easy first method of diagnosis of pregnancy. The hormone can be detected as early as the sixth day after conception.
Pregnancy detection kits containing a strip or card impregnated with anti-HCG globulin are readily available. The test is executed by immersing the proper end of the strip in urine or sprinkling three drops of urine on the indicated site of a card. Result is readable within two to three minutes.
References
Shaws Textbook of Gynaecology Dutta, DC:Textbook of Obstetrics and Gynaecology
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