Pregnancy has been in the news over the past month, with a royal baby back in October and the usual smattering of celebrity pregnancies. Pregnancy brings up a whole host of science and chemistry questions, the first of which is: how do pregnancy tests work? Enjoyed this post?
Well, first things firs, though there are a variety of pregnancy test brands on the market, they all look for the presence or absence of hCG, or human Chronionic Gonadotropic. This is a hormone made by the placenta that shows up in your blood or urine. Urine pregnancy tests are helpful in detecting the presence or absence of hCG, though not how much is floating around in your system.
You may suspect that you are pregnant if you have missed your period or have other symptoms of pregnancy. If you have regular periods and have missed your period by a week, it is likely that you are pregnant. However, if you have an irregular menstrual cycle, look out for other symptoms of pregnancy. For a start, you can confirm your suspicion that you are pregnant by buying an over-the-counter urine pregnancy test kit.
Pregnancy test strips checks the presence of HCG human chorionic gonadotropinwhich comes in urine very early for the duration of pregnancy. There are some steps for using test strips which is very useful for the women. Did you use this instructable in your classroom?
When testing for pregnancy you want to be sure. Each test offers a different way to learn your result so when the time comes, you feel as confident as possible. Some pregnant women may not have detectable amounts of the pregnancy hormone in their urine on the day they use the test.
Also send me the free 5-part email series Get Pregnant Now. While you are waiting for your result, you may notice a colored solution moving across the test strip. This is normal.
But did she take one? Instead, she made an appointment with an obstetrician. But the first thing the doctor did at the clinic was perform the urine pregnancy test.
A pregnancy test attempts to determine whether or not a female is pregnant. The most common tests use markers found in blood and urinespecifically one called human chorionic gonadotropin hCG. Identified in the early 20th century, hCG rises quickly in the first few weeks of pregnancy, peaking at 10 weeks.
Everything you need to know about pregnancy tests - so you can find the right test for you or read more about how pregnancy tests work. In pregnancy, hCG is produced first by the fertilized egg and later the placenta. Though hCG levels are very low at first, the level rises rapidly and predictably in the first weeks of pregnancy 4.