A pregnancy test attempts to determine whether a woman is pregnant. Records of attempts at pregnancy testing have been found as far back as the ancient Greek and ancient Egyptian cultures. Modern pregnancy tests look for chemical markers associated with pregnancy. These markers are found in urine and blood, and pregnancy test require sampling one of these substances. The tests work by detecting the hormone human chorionic gonadotrophin (hCG) in your urine. A chemical in the plastic stick changes colour when it comes into contact with this hormone, so the usual way of testing is to urinate on the end of the stick and watch for the result in the window.
The accuracy of Pregnancy test depends on how you use it. as long as you use them properly.
The tests work by detecting the hormone human chorionic gonadotrophin (hCG) in your urine. A chemical in the plastic stick changes colour when it comes into contact with this hormone, so the usual way of testing is to urinate on the end of the stick and watch for the result in the window.
You can buy pregnancy tests _ there are many in the web.
-melissa
