how-to-detect-pregnancy


HOW TO KNOW THAT THE RESULTS COULD BE FALSE?




To Know if there is Pregnancy Urine Pregnancy Test can be done at home.
Ask for velocity ® in medical shop. This is manufactured and sold in India by Dr. Reddy's Laboratories. It is legally and medically safe and commonly used even by doctors for their patients



FALSE POSITIVE
hCG may remain detectable for a few days
to several days after delivery, abortion, or
natural termination.

A number of conditions other than pregnancy,
trophoblastic disease and certain non-trophoblastic neoplasms including testicular tumors, prostate cancer, breast cancer, and lung cancer, cause elevated levels of hCG. Therefore, the presence of hCG in urine should not be used to diagnose pregnancy unless these conditions have been ruled out.

Drugs which contain hCG result in false positive.
FALSE NEGATIVE
Very low levels of hCG (less than 50 mIU/ml) are present
in urine specimen shortly after implantation.

False negative results may occur when the le
are below the sensitivity level of the test.

As a rule, hCG levels, if you are pregnant, are between 5 - 50 mIU a week before your period is due. The hCG levels in your system should double every two to three days.

In normal pregnancy, hCG can be
detected in serum as early as 7 days following
conception. The concentration of hCG continues
to rise rapidly, frequently exceeding 100 mIU/ml by the
first missed menstrual period and peaking in the
30-200,000 mIU/ml range by 10-12 weeks into
pregnancy.


UPT gives presumptive diagnosis.
Confirmed pregnancy diagnosis should only be made by a physician
References:

http://lib.store.yahoo.net/lib/early-pregnancy-tests/pregnancy.pdf
http://www.hptn.org/Web%20Documents/HPTN035/LaboratoryTraining/UrinePregnancyTest.pdf
http://www.babyhopes.com/pregnancy-test-sensitivity.html




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