A sexuality resource for the Brandeis University community and beyond...  

Home

About SSIS

Resources/Referrals

Help in a Crisis

Safer Sex

Sexual Assault

STIs

 

 

 

 

 


Home > Safer Sex > Home Pregnancy Tests

What is a home pregnancy test?

A home pregnancy test measures the presence of the hormone human chorionic gonadotropin (hCG) in your urine. HCG, which is a glycoprotein produced by the placenta shortly after the embryo attaches to the uterine lining, builds up rapidly in your body in the first few days following implantation . Usually hCG can be detected by a home pregnancy test 7 to 10 days after ovulation occurs - a couple of days before your period is due.

When to test?
Home pregnancy tests are most accurate about 27 days after conception. That is when a menstrual period is 10-13 days late. The home pregnancy tests sold in SSIS can provide accurate results as early as 6-15 days after conception.

Which brand?
There are many different brands of home pregnancy tests available. Which brand you choose depends upon your preferences. Some brands are the one-step type you urinate directly on, others are cassettes, which require the use of a specimen cup. Each brand differs on the sensitivity ratings: some you can test earlier than when your cycle is due, others you may need to wait until the day after.

How do I use a home pregnancy test?
First, read the directions carefully, because the instructions will vary with different brands. Some require you to urinate in a cup and then, using a dropper, place a small sample into a testing well. Others let you urinate directly onto a stick. But, fundamentally, all pregnancy tests work the same way - they measure the amount of hCG in your body. If you use a home pregnancy test you must follow the directions carefully and correctly.

Are home pregnancy tests accurate?
If used perfectly, home pregnancy tests are 97 percent accurate. But mistakes do happen, which is why some kits come with two tests.

  • Negative. There are several reasons why a home pregnancy test may be negative: You may not be pregnant or your body may not be producing a normal amount of hCG. If you test too early (before the first day of your missed period), you may get a false negative result because not enough of the hormone has built up in your system. If the test comes back negative but you still suspect you're pregnant, wait a few days, read the directions carefully, and try again. The chances of receiving a false negative test result are greater than that of a false positive.

  • Positive. Almost always means pregnant. False positives (says pregnant when not) are very rare. Things that cause a false positive include marijuana, aspirin, hormones, birth control pills, and soap or protein in urine.

Where can I buy one?
Home pregnancy tests may be purchased without a prescription at most drugstores. They run between $8 and $12. SSIS sells Pregnancy Tests in sets of three tests for $4.

Tips On Testing

  • However eager you are to find out if you are pregnant, try to wait until the next morning to get a sample of your urine. The first urine in the morning gives the most reliable results.

  • Read instructions carefully and perform them correctly in order to gain the most accurate results.

  • Use a timer or have a watch on hand to make sure you wait for the required number of minutes before looking for results.

  • After taking a urine sample, make sure you cover the container, to prevent contamination.

  • Make sure your hands and any container you use to perform the test are clean. Never reuse containers if you are retesting.

  • While waiting, put the test kit in a safe place away from heat and risk of contamination.

If you continue to have questions concerning whether you are pregnant contact your doctor or other medical professional for an examination.