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:

Telegraph.co.uk

Aquarobics May Help Ease Labor
Washington Post, United States - Nov 21, 2008
21 (HealthDay News) -- Doing aquarobics during pregnancy reduces the amount of pain-killing medication requested by women during labor, according to a ...
Water aerobics help delivery go swimmingly Los Angeles Times
Pregnant Women Who Do Aquarobics Have Easier Deliveries, Study Finds Science Daily (press release)
Aquarobics during pregnancy make childbirth more bearable (Re-issue) Thaindian.com
dBTechno - Expressindia.com
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www.worldbulletin.net

Parent Smoking During Pregnancy Raises Kids' Heart Risks
Washington Post, United States - Nov 20, 2008
Records showed that 29 percent of the mothers and more than 60 percent of the fathers smoked during the pregnancies. The inner lining of the carotid ...
Study: Mothers who smoke damage children's arteries Dallas Morning News
Smoking while pregnant harms baby's blood vessels Reuters India
Another reason not to smoke while pregnant Columbus Dispatch
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Oneindia

Weight-Bearing Exercise Throughout Pregnancy Boosts Heart Health
eMaxHealth.com, NC - Nov 21, 2008
Many women stop exercising during pregnancy. According to the results of a new study, weight-bearing exercise throughout pregnancy can help women maintain ...
Canola Oil Consumed During Pregnancy Lowers Breast Cancer Risk for ... Health.com
Migraine's Silver Lining: Lower Risk of Breast Cancer LiveScience.com
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Rochester zoo hopes polar bear is pregnant
Newsday, NY - 17 hours ago
That's the question officials at the Seneca Park Zoo in Rochester are asking themselves after seeing signs of pregnancy in their 18-year-old polar bear, ...


TheMedGuru

Weight-loss surgery bodes well for pregnancy
Los Angeles Times, CA - Nov 19, 2008
Now researchers have found that obese women who undergo weight-loss surgery before becoming pregnant are less likely to have pregnancy-related health ...
Bariatric Surgery Before Pregnancy Benefits Moms, Babies U.S. News & World Report
Weight-loss surgery helps with pregnancy: study Reuters
Bariatric Surgery May Improve Pregnancy Outcomes in Obese Women Medscape (registration)
Drug Topics Magazine - MarketWatch
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Teen pregnancy: How to help
Statesman Journal, OR - 19 minutes ago
Donations of maternity clothes, baby clothing, nursery items are furniture are needed. Also useful are donations for fund-raising auctions, ...


Eat, drink and be merry, but pregnancy food rules no fun
Nashua Telegraph, NH - 6 hours ago
Then, a little more than a week ago, Kaiser Permanente released a study showing that more than one in five women gain too much weight during pregnancy, ...


Unintended pregnancy raises risk of future ones
Reuters - Nov 20, 2008
NEW YORK (Reuters Health) - Women and girls who've had an unplanned pregnancy in the past are at risk of future unplanned pregnancies, regardless of other ...
Some women unaware of risks of delaying motherhood Reuters UK
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Ipsilateral ectopic pregnancy occurring in the stump of a previous ...
7thSpace Interactive (press release), NY - 1 hour ago
Ectopic pregnancy continues to be a significant cause of maternal morbidity, mortality and reproductive failure in Nigeria. Ipsilateral ectopic pregnancy ...


British charity urges sex clincs in school
United Press International - 18 hours ago
The bureau, one of Britain's leading charities, maintains every student 11 to 18 years old should have access to advice on contraception, pregnancy tests ...

Pregnancy - Google News

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