(thing) by funky49 Wed Dec 26 2001 at 20:52:46
hCG is human chorionic gonadotropin. This glycoprotein hormone is produced when the fertilized egg implants into the uterine lining (the placenta) during pregnancy. Home pregnancy tests are designed to detect this hormone. The home pregnancy tests that detect the lowest number of mIU per mililiter give the earliest results.

hCG is composed of two subunits. The alpha subunit is common to all glycoprotein hormones in a given species. while the beta subunit is hormone specific.
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