Pregnancy Information

How do Pregnancy Tests Work?


Pregnancy tests identify a special hormone in the blood or urine produced during pregnancy. This hormone is called human chorionic gonadotropin (HCG), often referred to as the pregnancy hormone. There are two basic types of pregnancy tests, blood and urine.

Home pregnancy test are primarily urine tests. These are easy to use, private and inexpensive. Most are quick and very accurate, claiming a 99% accuracy rate. Tests can be purchased at drug and discount stores without a prescription. False positives are very rare, but a false negative is possible if the test is done too early for sufficient quantities of HCG in your urine. False negatives can be avoided by waiting until your period is due, or about 2 weeks after you ovulate. Confirming a negative result with a second test a few days or a week later is wise. Always follow a positive result with a trip to your doctor for confirmation and prenatal care.

Medicines containing HCG can cause a false positive on your home test, but most over-the-counter and prescription drugs will not affect test results.

Blood test results may take a few hours or a day, and usually require a trip to the doctor or lab. There are two types of blood tests for pregnancy. The first, a qualitative HCG blood test, provides simple positive or negative results, similar to a urine test. This test is slightly less accurate than the quantitative blood test (or beta HCG test) which measures the exact amount of HCG in the blood. The beta test's ability to pick up small traces of HCG in the blood increase its accuracy.

Whichever type of test you choose, it is important to remember that a follow-up trip to the doctor is important for you and your new baby.

Maria writes for Pregnancy Due Date, a site that tries to information for expectant mothers. For more great pregnancy articles, visit our Pregnancy articles archive.


MORE RESOURCES:

Contactmusic.com

Jamie Lynn Spears talks about her teen pregnancy and career plans
TheCelebrityCafe.com
After starring as the lead role in a Nickelodeon show, the actress announced she was pregnant with daughter Maddie and in an instant, that innocent 16-year-old girl vanished from people's eyes. Now a 21-year-old, Spears sat down with Glamour for their ...
Jamie Lynn Spears Opens Up About Teen PregnancyContactmusic.com
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Teen pregnancy rates fall
Martinsville Bulletin
By PAUL COLLINS - Bulletin Staff Writer The total number of teenage pregnancies in Henry County and Martinsville declined significantly from 2006 to 2010, exceeding both the state and district declines. According to data from the Virginia Department of ...

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TIME

Pfizer Birth Control Recall: Could Women Who Get Pregnant Sue?
TIME
If women wind up pregnant from faulty pill packets, product liability lawsuits or "wrongful pregnancy" cases — reminiscent of medical malpractice — could be filed. By Bonnie Rochman | @brochman | February 3, 2012 | + It didn't take long for the ...
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New York Daily News

Snooki is not pregnant: Rep denies rumor 'Jersey Shore' star is expecting her ...
New York Daily News
The pint-sized party-hopping star of “Jersey Shore” is not pregnant despite rumors that claimed otherwise Wednesday morning, her rep tells the Daily News. According to Radar Online, the upcoming issue of Star magazine claims the 24-year-old is ...
So True? So False? Is Jersey Shore's Snooki Really Pregnant?!E! Online
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Daily Mail

Pregnant Women Over 50 'Do Pretty Well' Study Finds
LiveScience.com
By implanting embryos produced by in-vitro fertilization using egg cells donated by younger women, women who have passed menopause can become pregnant and give birth. A new study of 101 women age 50 and older who had children using donated eggs reveals ...
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The Imperfect Parent

Connecticut mom told maternity leave viewed as resignation
The Imperfect Parent
When Amy Zvovushe took a new job with Ryan Partnership, she never imagined that when she became pregnant and informed her Human Resources department of her condition she'd be told she wouldn't have a job waiting for her when she came back to work after ...
Amy Zvovushe alleges her employer in Connecticut violated discrimination laws ...ABC News

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Consignment Store Born after Miracle Pregnancy
Patch.com
Then, nine years later, Bever discovered she was pregnant. She was ecstatic, but she also felt conflicted about her future. She had dreamed of a baby for so long that she couldn't bear the thought of putting her child into daycare.



Daily Mail

Captain of her heart! Chris Hemsworth shares an intimate moment with pregnant ...
Daily Mail
By Lucy Buckland They got married just over two years ago but for actor Chris Hemsworth and pregnant wife Elsa Pataky, the magic is still very much alive. The gorgeous couple shared an intimate moment as they prepared to fly from LA to London.

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Globe and Mail

Birth control recall raises risk of unplanned pregnancy
Baltimore Sun (blog)
BOSTON (Reuters) - Pfizer Inc is reaching out directly to women consumers to warn them about its US recall of one million packets of birth control pills as concerns mounted that a manufacturing error could raise the risk of unplanned pregnancies.
What to do if you have recalled birth control pillsBoston Globe
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The Age

Top Vixen's pregnant pause
The Age
The two-time Vixens best-and-fairest winner said she was yet to decide if the pregnancy would end her career. ''I kind of want to leave that open,'' the 34-year-old said. ''This year one of my real dreams was to get back from my Achilles injury and ...
Netballer McMahon announces pregnancySydney Morning Herald
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