p****l
发帖数: 3483 | 1 有看到有这一说
这是什么原因,这样的话买排卵试纸来测比买HCG试纸更便宜呀 | b******e
发帖数: 202 | 2 网上看到的，分享一下：
o An ovulation prediction kit or test detects an LH surge in a woman's
urine. These tests work in a similar way as pregnancy tests, but are read in
a different way. Both a pregnancy test and an ovulation test have a control
line and a test line. With a pregnancy test, two lines indicates a positive
result. However, with an ovulation test, two lines do not necessarily
indicate a positive result. Because LH builds up before ovulation, you will
see two lines on a test for several days before ovulation. The result is
positive when the test line is darker than the control line and the LH surge
has been detected. When the LH surge is detected, ovulation will occur in
12 to 36 hours.
Ovulation Tests as Pregnancy Tests
o Because of the similarity of hCG and LH at the molecular level,
ovulation tests can detect pregnancy as well. The difference between hCG and
LH is a beta subunit attached to the hCG. The website peeonastick.com
illustrates the difference by describing LH and hCG as identical twins. The
difference between them is that hCG is wearing a hat and LH is not. So the
ovulation test will turn positive when it detects either one of the
identical twins. But because pregnancy tests are also looking for the hat on
the twin, a pregnancy test will not turn positive during ovulation. So if
you are pregnant, an ovulation test will turn positive.
Considerations
o The sensitivity levels of ovulation tests are generally lower than the
sensitivity levels of home pregnancy tests. Because ovulation tests are
detecting the surge of LH, they are made to have lower sensitivities. If
they are too sensitive, they will turn positive at the presence of LH.
Because LH is present for several days before ovulation, ovulation tests
must be made to predict high levels, or the surge, of LH. Ovulation tests
have an average sensitivity of 30 mIU. And early home pregnancy tests can
detect pregnancy at levels as low as 12.5 mIU, according to peeonastick.com.
So a home pregnancy test will often turn positive before an ovulation test
will turn positive.
【在 p****l 的大作中提到】
: 有看到有这一说
: 这是什么原因,这样的话买排卵试纸来测比买HCG试纸更便宜呀
| p****l
发帖数: 3483 | 3 原来是这样,谢谢,明白了
in
control
positive
will
surge
【在 b******e 的大作中提到】
: 网上看到的，分享一下：
: o An ovulation prediction kit or test detects an LH surge in a woman's
: urine. These tests work in a similar way as pregnancy tests, but are read in
: a different way. Both a pregnancy test and an ovulation test have a control
: line and a test line. With a pregnancy test, two lines indicates a positive
: result. However, with an ovulation test, two lines do not necessarily
: indicate a positive result. Because LH builds up before ovulation, you will
: see two lines on a test for several days before ovulation. The result is
: positive when the test line is darker than the control line and the LH surge
: has been detected. When the LH surge is detected, ovulation will occur in
|
|
