hi they are not reliable being used as hpt but some people use them and see if they get a dark line the same or darker than the control line which can indicate pregnancy if its used around the time of AF, u can try but i would get a hpt for a reliable answer gl to u
Thanks i just read that as i have been googling it i also found this on a website. Different websites tell you different things so it is hard to know
"Using the OPK as an HPT Pregnancy Test
You cannot and and shouldn't use the OPK ovulation predictor kit as a HPT home pregnancy test.
Each of these two tests checks for a different hormone:
The home pregnancy test HPT checks for the pregnancy hormone hCG
The ovulation predictor kit OPK checks for the LH hormone
A positive OPK will not tell you with enough certainty that you are pregnant. And if the OPK is negative you could still be pregnant.
When you do a pregnancy test you want a straight answer: Am I pregnant or not? A positive HPT tells you with 99+% certainty that you are pregnant.
Only a positive HPT pregnancy test will give you that answer with certainty, the positive OPK will not give you that answer.
OPKs have a high false positive as well as a high false negative rate for being pregnant. If an OPK is positive you could still NOT be pregnant, and if it's negative you could still BE pregnant.
You should not use one to check for the other.
The OPK checks for the LH hormone, prior to ovulation
The HPT pregnancy test check for the hCG hormone
Coincidentally, you could have a positive OPK, an elevated LH when you are pregnant, but a positive OPK will not confirm the pregnancy. You could have a false positive OPK but not a false positive pregnancy test.
Only a positive pregnancy test tells you that you are pregnant, and if the pregnancy test is positive that's a nearly 100% confirmation you are pregnant.
A positive result on an OPK could mean you are near ovulation, pregnant, or the test is picking up an entirely different hormone or element. Or it may be negative even if a woman is pregnant. With a positive HPT there is no doubt.
OPK's work differently than HPT's. A pregnancy test will develop 2 lines only if hCG (pregnancy hormone) is detected. Thus, "a line is a line" when determining a positive HPT. OPK's work differently. An OPK has a "control" line and a "test" line, just like an HPT. Unlike an HPT, however, the mere presence of a "test" line does not mean the test is positive. The test line must be as dark as, or darker than, the control line to be a positive result (meaning that a surge was detected, rather than the ordinary amount of LH usually found in your urine every day.)
This means that there is already some ambiguity involved in reading an OPK's results. Sometimes the line is almost as dark as the control line, but perhaps not quite as dark. Sometimes only the edge turns dark, or the top half of the line is darker than the bottom.
Additionally, OPK's are not as sensitive as a lot of HPT's are. This means that, if pregnant, you are likely to get a positive HPT earlier than you would get a positive OPK.
On a different note, the OPK is usually more expensive than the pregnancy test. Why use something unreliable and more expensive when you can get the real thing cheaper?"
They arnt reliable for the simple fact you dont know which one its picking up. lh or hcg. Ive gotten +opks the days before af, even while af was here and obviously wasnt pregnant! You can get lh surges other than O time.
Any opinions, advice, statements or other information expressed or made available on BabyandBump.Momtastic.com by users or third parties, including but not limited to bloggers, are solely those of the respective user or other third party. They do not reflect the opinions of BabyandBump.Momtastic.com and they have not been reviewed by a physician, psychologist or parenting expert or any member of the BabyandBump.Momtastic.com staff for accuracy, balance or objectivity. Content and other information presented on BabyandBump.Momtastic.com are not a substitute for professional medical or mental health advice, counseling, diagnosis, or treatment. Never delay or disregard seeking professional medical or mental health advice from your physician or other qualified health provider because of something you have read on BabyandBump.Momtastic.com. BabyandBump.Momtastic.com does not endorse any opinion, advice, statement, product, service or treatment made available on the website. If you think you have a medical emergency, call your doctor or emergency services immediately.