Hi everyone, just wondering if those who've been on clomid, is it ok to use OPK's? I was just wondering if they'd give you a false neg/pos? I totally forgot to ask my doctor! And I'm too impatient to wait for the blood test on CD21 to see if I've ovulated or not...
Also, another question for those who've been using OPK's for a while. I'm a little confused as I took one yesterday & the test line was very faint (could barely see it). Again this afternoon around 2pm, and fainter line then yesterday. I took another at 6pm...just because I got tummy pains & some EWCM (sorry for TMI) and the line was alot darker...not as dark as the control line though. So, now I'm just really confused! I also had a bit of water this morning (1L) so I don't know if that affects it either?
Sorry for the 20 questions, am just confused! If anyone knows anything about it, I'd love to hear it
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21-06-2012 18:38 #1
Confusion with OPK's & also being on clomid..
21-06-2012 18:51 #2
I have just looked it up on google and here is what I could find:
Clomid can cause an OPK to register a false positive. This will happen if the OPK is used too soon after finishing the prescription for Clomid. OPK manufacturers recommend that you should wait at least three days after stopping Clomid before using an OPK. Thus, if you take Clomid on days 3-7 of your cycle, you can begin to use the OPK on day 10. If you take Clomid on days 5-9, then you should wait until day 12 to use the OPK. Because Clomid causes the release of LH into the blood******, the ovulation predictor test will often notice this LH and give you a false positive result.
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21-06-2012 18:53 #3
Hi i was also wondering same thing about clomid but i don't think it does skew results. I think i heard that pcos can cause false results though.
With an opk the test line must be as dark or darker than the control line if you're ovulating. So its not like a pregnancy test at all where even a faint line is positive. There is always some LH in the body hence faint opk lines but its the surge when line is dark that shows ovulation. Although for some people lines can still be slightly lighter than control line and can be hard to know if its a surge or not. So think its important to do them regularly and also check for other signs like ewcm so you're not just relying on opk.
I'm on my first month of clomid now, hoping to ovvlate in next few days so hope I've got this right!
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21-06-2012 19:02 #4Senior Member
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- Jan 2012
Firstly, its fine to use OPK's while on clomid. I personally couldnt get them to work, but my cycles were 40 days to 200+ days. So I started using them on CD 10-ish and usually I would get sick of doing them by CD 20 or so and would stop.
Just so you are aware, dont worry too much if it says you didnt ovulate on the blood test on CD 21. The blood test on CD 21 assumes you ovulated on CD 14. If you ovulate earlier or later, they could get a false negative for ovulation on the blood test. Using OPK's daily, you will know when you ovulated.
The cycle that I fell pregnant on, I ovulated on CD 39!!! I took clomid on one cycle, which didnt work, then stopped the clomid due to taking antibiotics, and fell pregnant that cycle.
I have read and been in a few TTC groups over the years (took us 2.5 years), and many women using OPK's realised they ovulated earlier or later than CD 14 and the blood test came back negative for ovulation.
In regards to how to use the OPK's, they are positive when the test line is darker than the control line. Yes drinking water and the time of day affects the test. Re-read the instructions as some tests are different to others. I would keep testing as the last test you took was getting darker. Also, you ovulate the day of (or day after) the EWCM finishing (you may get it for a few days, its when it stops thats you ovulate).
So it sounds like you may be ovulating in the next few days. Keep up the OPKs and DTD ASAP and for the next few days!
Good luck Sticky Baby Dust
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22-06-2012 10:54 #5
Thanks heaps for the replies
Thanks Lili, for finding that. I was thinking it may effect things but that makes sense if testing to close to taking the tablets.
Thanks Bondgirl, this is also my first month of taking clomid. Thanks for letting me know about the OPK's...I never used to ovulate because of pcos, so never really used them properly before & wow, can they be confusing!! I'm fairly confident that I got a positive one today...test line is as dark as the control line. I just hope its a proper positive & not a false one. Good luck, I hope you ovulate soon!! And I agree, to keep an eye on other signs too
Thanks Loveheart, I really didn't know if it was ok to use OPKs on clomid & really appreciate you letting me know Thanks for letting me know about the day 21 blood test too, my bodys all over the place so before I even started taking clomid I thought that one would def come back neg. Wow cycle day 39, thats awesome you fell preg though, yay! I'm pretty sure I got a positive OPK this morning, so hopefully I'll ovulate in the next day or two...all this stuff is sooo confusing! Thanks heaps again!!
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