Nov 12, 2019 at 2:22 PM. A lot women (including myself!!) think we ovulate on average 12-36 hours after our PEAK on our OPK. This is not necessarily true. "On average, ovulation occurs 24 hours after the first positive ovulation test. That means that you could have several days of positive tests in a row, but already ovulate after the first day."Mar 2, 2018 · In the 3-5 days leading up to ovulation, your cervical mucus will become an egg white consistency, clear and stretchy. This is your fertile mucus and keeping track of it will help you to determine your fertile window. Height of cervix In the days before ovulation, your cervix will change position and shape to help the sperm travel to the ... In the 3-5 days leading up to ovulation, your cervical mucus will become an egg white consistency, clear and stretchy. This is your fertile mucus and keeping track of it will help you to determine your fertile window. Height of cervix In the days before ovulation, your cervix will change position and shape to help the sperm travel to the ...Hi everyone, I have been trying for 14 months and have recently been prescribed progesterone. This month I didn’t have a positive OPK, but did have a…Yesterday I OPK tested twice with a seemingly positive results (if not 100% it was really, really close). I OPK tested again this morning and the…In order to "prove" ovulation yes a rise in temps is needed but my OBGyn seems to think that the opks tests are the best standard for tracking ovulation. Also keep track of cervical mucus, that helps too. If you have a 30 day cycle I would start testing one opk a day starting around day 12 and then do twice a day on days 14/15 (or whatever days ...Sep 3, 2011 · Hiya, so I’m 7/8 dpo today… had positive opk on 17th and I had ovulation pain the same day so That’s why I say 7/8 dpo opk was negative the next day. I don’t check BBT but my Fitbit app shows a temp dip on 17th and then rise too. This month... I'm wondering if any of you OPK/BBT trackers have had anything like this? 4 days of positive OPK in a row and then negative today with no rise in BBT?? I've always had my temp spike in conjunction with my positive OPK and so this has me concerned. I'm also on my second cycle after a miscarriage... help??? Anyone else experience this? Share your ...Jan 2, 2014 · You don't O on the day of a positive opk. It's 12-36 hours after the positive opk, so that's the reason for the low temps for now. Sometimes you can get a positive opk and not O. BBT rise day before positive OPK. March 18, 2023 | by lliiivvii1112. I’m on cycle 7 trying to conceive baby #1. My BBT was raised yesterday (98F) and I hadn’t got a positive OKP yet so I figured I missed my peek. Because I’m curious I continued taking OPKs and got a very dark positive this morning along with...In answer toClaire R (1533) Anyone?! Thks! X. Hi Claire, You opk surge usually occurs a day or two before your bbt rise so watch out for it! You then need 3 consecutive high temps to confirm your ovulation on fertility friend then you can get an accurate count on your dpo, good luck! xx.I got my bfp yesterday (yay!!) and If I'm reading my opk/bbt chart right, that's 10dpo. That seems early... does that mean I'm more likely to have twins? Or am i reading it wrong, and I have my dpo wrong? i had a cp last cycle so I'm not sure if that made it wonky.photos: my bfp from yesterday, my bbt... Every cycle I have been able to measure the LH surge, and also the temp increase when I have ovulated and drop in BBT when AF is arriving. My FP/Ovulation has been all over the place though, so literally I measure OPK 2 times a day just to make sure I don't miss it. The range has been 18-37 days for ovulation - yup, that's a lot of OPKs!Oct 20, 2021 · If you have fertile cervical mucus but no rise in temperature, it could be that you're not ovulating. While fertile quality cervical mucus can warn you that ovulation is coming, so you can time sex for pregnancy, it doesn't confirm that ovulation actually took place. You can have fertile quality cervical mucus, but not ovulate. So, on CDs 10 & 11 I got high then CD12 peak on the OPK but I'm now CD 16 and no BBT rise. I don't know how long you'd normally wait between one and the other but I'd have thought 2-3 days max. Now I'm wondering if I did OV and need to be patient or need to get the OPKs out again!!Jackelbee3. don't bother with any pregnancy tests if your temp starts to decline. It should be elevated after ovulation and will decline steadily if AF is coming. Sounds like you are doing all of the right things. Good luck to you. Charting my BBT along with using the OPK have really helped me a lot. Jacks.Ovulation usually occurs about 14 days before your period. Your LH surge occurs a day or two before that. So knowing how long your cycle is (from one period to the next) will help you figure out ...Feb 28, 2021 · See last answer. Amme N. 28/02/2021 at 5:24 pm. After u ovulate you should have 3 consecutive rises in temp... this is mine this month so I know I’ve ovulated and have been strict with timing temp taking this month.. last month I was a bit wishy washy. Edited on 28/02/2021 at 5:25 pm by Amme N. Aug 24, 2022 · Don't drink a lot of liquid during the two hours before testing. Too much liquid dilutes your urine, which could make it more difficult to detect the surge. Read the results within 10 minutes. A positive result won't disappear, but some negative results may later display a faint second color band that would be misleading. Using a salivary ... A bit over 90% of cycles with a positive OPK are ultimately ovulatory (but not necessarily the day after the positive OPK, as the conventional wisdom would tell you). (EDIT: source here) Overall, no, it’s not necessary to track every possible fertility sign, and if you don’t want to track BBT, then you shouldn’t.Hi everyone, I got my +opk on cycle day 12 around mid day and my ff chart says that i ovulate on day 12 aswell, I'm using the clear blue digitals.. they say once you get the peak smiley not to keep testing but being impatient 🙈 I decided to use my other reader, I got a negative the evening of the 12 which I now know is because it had never been used and had no baseline reading but the next ...Between oversleeping one day, some sleep deprivation, heavy drinking one night, indiscernible OPK results, and using the least-adored BBT on TB, I'm basically just crossing my fingers at this point. Thought the temp would go up today for O yesterday but it went down so I'm hoping O today for pretty good timing. Sep 12, 2018 · Tracking Fertility: OPK vs. BBT. Q: Which is a better method of tracking fertility — an ovulation predictor kit (OPK) or basal body temperature (BBT) charting? A: An ovulation predictor kit changes color before you ovulate, based on a surge in your luteinizing hormone (LH), usually 1-2 days before ovulation. Is Your BBT More Accurate Than An OPK? Experts Weigh In Life Manuel Findeis/Fotolia Checking Your BBT Versus Using An OPK — Which Is More Accurate? by Caroline Shannon-Karasik Oct. 14, 2017...Nov 11, 2017 · I've been reading online that some women don't get their temp rise until 3 or 4 days after a positive opk. Praying this happens to me. Plan on continuing with OPKs and bd'ing every 2 or 3 days ... Are you taking your BBT its the only real reliable way to tell if you have Ovulated. But if your getting highs then I would just keep having sex and hoping that you catch O even if you don't get a peak. I'm really sorry this is so frustrating for you. Oh and by the looks of things, you don't necessarily need a BBT but I've really loved having more accurate charts. :) I got my Life Brand BBT at Shoppers Drug Mart. I change them every 3-4 months so I can rely on my temps being accurate. I don't use a new BBT until the next cycle though.Ideally, your LH levels should be around 1.0 or higher on your peak day as the test line becomes as dark as a control line. However, some women ovulate below this level. You’re always looking for the last, darkest day on your ovulation tests. For the majority of women, ovulation occurs in the 24-36 hours after a peak is found.Basal body temperature (BBT) tracking: Before and after ovulation, BBT (your body’s lowest resting temperature) dips, then rises again. Tracking this shift can let you know if an egg was released. Tracking this shift can let you know if an egg was released.Between oversleeping one day, some sleep deprivation, heavy drinking one night, indiscernible OPK results, and using the least-adored BBT on TB, I'm basically just crossing my fingers at this point. Thought the temp would go up today for O yesterday but it went down so I'm hoping O today for pretty good timing. 1. Changes in basal body temperature (BBT) Your BBT is your lowest body temperature (your body temperature at rest) in a 24-hour period. On the day after you ovulate, your BBT will go up slightly, by 0.5 to 1.0 degrees Fahrenheit. It will stay elevated until your next period. It may also dip slightly just before the increase.A BBT spike (or progesterone testing) will show that ovulation did actually happen. So it's possible that while you're getting a positive OPK, you may not actually be ovulating when you think you are. If you do eventually get a BBT increase, it could mean that your body is trying again and successfully ovulating the 2nd time.I was diagnosed with endometriosis and pcos. I started metformin last month, used provera to kick in my period then letrozole on cd 3-7. FF had marked cd 10 as my ovulation but that is way too early for me. My typical cycle is more or less 45 days and I ovulate somewhere from cd 25 onwards. But my BBT have been up.Sep 16, 2011 · The egg could drop anywhere from 12-48+ hours after you get your last +OPK. And, to make it more confusing, sometimes your body can ramp up, have the LH surge (you get a +OPK) and then for some ... Dec 15, 2017 · Hi All. Husband and I started TTC mid oct 2017. Came off oral contraceptives in 1st week of Oct 2017. Have started using OPK and BBT this cycle (currently on cd16 and last cycle was 29 days, previous cycle was 23 days) but still havent had a positive OPK result (clear blue pink tests) which i check first thing in the morning as the pack tells you to. Haha! Don't even ask when I start xmas prep. Still camping but I lost my group for a bit. My temp was pretty consistent this morning. I missed my alarm but the birds woke me up. Using the OPK in the camp bathroom was an experience but it was darker from the day before though still not a clear positive. CS/Q: I'm glad I started temping and using ...CD 14: 96.94 CD 15: 97.11 CD 16: 97.18 CD 17: 96.81 CD 18 (first positive OPK): 97.08 CD 19: 97.18 CD 20: 97.18 CD 21 (today): 97.26 Is it possible I ovulated the same day as first positive so the CD 17 reading was the dip, and then every day since then has been a little higher?Sep 19, 2012 · A Discussion on OPK’s vs BBT Charting. Many women become confused when their OPK’s (Ovulation Predictor Kits) and BBT’s (Basal Body Temperatures) don’t agree on the day of ovulation- understandably so. This is one of the more confusing topics I’ve researched! We’ll file this under “advanced topics”. Here’s why. A Discussion on OPK’s vs BBT Charting. Many women become confused when their OPK’s (Ovulation Predictor Kits) and BBT’s (Basal Body Temperatures) don’t agree on the day of ovulation- understandably so. This is one of the more confusing topics I’ve researched! We’ll file this under “advanced topics”. Here’s why.Sep 7, 2022 · Ovulation test strips are urine tests that you use at home to detect impending ovulation. They work by detecting the luteinizing hormone (LH), which increases to prompt the release of the egg during ovulation. Sometimes they are called ovulation predictor kits (OPKs), or simply ovulation tests. In order to "prove" ovulation yes a rise in temps is needed but my OBGyn seems to think that the opks tests are the best standard for tracking ovulation. Also keep track of cervical mucus, that helps too. If you have a 30 day cycle I would start testing one opk a day starting around day 12 and then do twice a day on days 14/15 (or whatever days ...CD 14: 96.94 CD 15: 97.11 CD 16: 97.18 CD 17: 96.81 CD 18 (first positive OPK): 97.08 CD 19: 97.18 CD 20: 97.18 CD 21 (today): 97.26 Is it possible I ovulated the same day as first positive so the CD 17 reading was the dip, and then every day since then has been a little higher? Sep 3, 2011 · Hiya, so I’m 7/8 dpo today… had positive opk on 17th and I had ovulation pain the same day so That’s why I say 7/8 dpo opk was negative the next day. I don’t check BBT but my Fitbit app shows a temp dip on 17th and then rise too. This month... In the 3-5 days leading up to ovulation, your cervical mucus will become an egg white consistency, clear and stretchy. This is your fertile mucus and keeping track of it will help you to determine your fertile window. Height of cervix In the days before ovulation, your cervix will change position and shape to help the sperm travel to the ...Hi everyone, Diagnosed with PCOS in Feb. 2010. Was told to save my money and not bother with BBT, charting, and OPK's cause they wouldn't be accurate since I have PCOS.What is the difference between BBT and ovulation predictor kits (OPK)? An ovulation predictor kit measures LH levels, which surge before ovulation. Therefore, OPKs can detect your fertile window in advance, before ovulating. Ideally, we should start having sex before the surge, and when the test becomes positive, we can increase the frequency.If you have fertile cervical mucus but no rise in temperature, it could be that you're not ovulating. While fertile quality cervical mucus can warn you that ovulation is coming, so you can time sex for pregnancy, it doesn't confirm that ovulation actually took place. You can have fertile quality cervical mucus, but not ovulate.The month I conceived, I had a negative OPK 2 days before my ovulation, which was detected with my bbt. Good thing we had sex during that time or I would’ve completely missed it. LikeBBT is strictly a morning temperature, right after waking and before getting out of bed. Because of this, it’s normal for your temp to be higher later in the day. Body temperature is very sensitive to movement, eating, and basically every other external factor, which is why it’s so important to test first thing in the morning after being at ...Nov 12, 2019 at 2:22 PM. A lot women (including myself!!) think we ovulate on average 12-36 hours after our PEAK on our OPK. This is not necessarily true. "On average, ovulation occurs 24 hours after the first positive ovulation test. That means that you could have several days of positive tests in a row, but already ovulate after the first day."If your ovulation test is positive, this means that your LH levels are above the threshold considered to be “surging” – meaning that ovulation will likely happen within 24-36 hours. At rest, typical LH levels for women are between 5-25 IU/L, and during the LH surge, they can peak up to 100+ IU/L. The most common and reliable threshold for ... Mar 23, 2015 · Bbt Spike But No Peak Fertility On Opk. K. Karter2013. Mar 23, 2015 at 10:39 AM. I have been TTC since December and still no luck. I started temping this cycle and got a big temp spike this morning. I am using clearblue advanced opk's and I have only gotten two flashing faces which means high fertility, but I haven't gotten a peak fertility yet. It is now Thursday (CD24) but by BBT has not risen - it has in fact been going down! What is happening and is there still a chance I can ovulate since my BBT hasn’t shifted? My BBT cycle last month indicated a temp shift immediately after ovulation on CD20 (didn’t use OPK last month). I’m quite worried I didn’t ovulate this month. Hello lovelies I am currently on CD20 and I think I Ov on CD18 Bedtime of CD17 I was convinced my opk was positive however my apps confirmed it wasn’t quite… Nov 11, 2017 · I've been reading online that some women don't get their temp rise until 3 or 4 days after a positive opk. Praying this happens to me. Plan on continuing with OPKs and bd'ing every 2 or 3 days ... So, on CDs 10 & 11 I got high then CD12 peak on the OPK but I'm now CD 16 and no BBT rise. I don't know how long you'd normally wait between one and the other but I'd have thought 2-3 days max. Now I'm wondering if I did OV and need to be patient or need to get the OPKs out again!!A BBT spike (or progesterone testing) will show that ovulation did actually happen. So it's possible that while you're getting a positive OPK, you may not actually be ovulating when you think you are. If you do eventually get a BBT increase, it could mean that your body is trying again and successfully ovulating the 2nd time.Jun 20, 2022 · Hey yeah as a few said you will likely ovulate today. Most often you will see day A. positive opk day B. Ovulation itself day C. Bbt Rise You may see some variance from this, sometimes it takes 2 days to see bbt rise or sometimes your LH surge may happen more than 24hrs before O. But generally the pattern is as listed above. Some women have a long surge for more than 1 day so this means if you just do the above and presume the next day the egg releases and that's the only day you BD (when it really does it 2-3 days later) you've hosed yourself. The best thing IMO is to keep tracking (+) OPK test until you have a BBT temperature drop also.Tracking Fertility: OPK vs. BBT. Q: Which is a better method of tracking fertility — an ovulation predictor kit (OPK) or basal body temperature (BBT) charting? A: An ovulation predictor kit changes color before you ovulate, based on a surge in your luteinizing hormone (LH), usually 1-2 days before ovulation.14K subscribers in the TFABChartStalkers community. Business, Economics, and Finance. GameStop Moderna Pfizer Johnson & Johnson AstraZeneca Walgreens Best Buy Novavax SpaceX TeslaAug 25, 2022 · OPK + BBT all over the place. Hey! I’m 28y, and new here. This is my 1st month ttc, I’ve been tracking my BBT (not always at the same time, between 7 and 8am) and my LH daily. I’m on CD 11 and my BBT has frequent ups and downs, also my LH some days is lower than the previous days like for example today I’ve logged into the app and says ... BBT rise day before positive OPK. March 18, 2023 | by lliiivvii1112. I’m on cycle 7 trying to conceive baby #1. My BBT was raised yesterday (98F) and I hadn’t got a positive OKP yet so I figured I missed my peek. Because I’m curious I continued taking OPKs and got a very dark positive this morning along with...It is now Thursday (CD24) but by BBT has not risen - it has in fact been going down! What is happening and is there still a chance I can ovulate since my BBT hasn’t shifted? My BBT cycle last month indicated a temp shift immediately after ovulation on CD20 (didn’t use OPK last month). I’m quite worried I didn’t ovulate this month. In order to "prove" ovulation yes a rise in temps is needed but my OBGyn seems to think that the opks tests are the best standard for tracking ovulation. Also keep track of cervical mucus, that helps too. If you have a 30 day cycle I would start testing one opk a day starting around day 12 and then do twice a day on days 14/15 (or whatever days ...Mar 29, 2012 · This is my first month using OPK's and I am CD20 or 21 and still no positive. I do tend to have longer cycles usually around 33 days sometimes more and a few times less so I am wondering if that it why. My tests have got a little darker but still nowhere near the control line. I do a test in the afternoon and lately I have been doing one in the ... Sep 16, 2011 · The egg could drop anywhere from 12-48+ hours after you get your last +OPK. And, to make it more confusing, sometimes your body can ramp up, have the LH surge (you get a +OPK) and then for some ... Haha! Don't even ask when I start xmas prep. Still camping but I lost my group for a bit. My temp was pretty consistent this morning. I missed my alarm but the birds woke me up. Using the OPK in the camp bathroom was an experience but it was darker from the day before though still not a clear positive. CS/Q: I'm glad I started temping and using ...Jun 20, 2022 · Hey yeah as a few said you will likely ovulate today. Most often you will see day A. positive opk day B. Ovulation itself day C. Bbt Rise You may see some variance from this, sometimes it takes 2 days to see bbt rise or sometimes your LH surge may happen more than 24hrs before O. But generally the pattern is as listed above. In order to "prove" ovulation yes a rise in temps is needed but my OBGyn seems to think that the opks tests are the best standard for tracking ovulation. Also keep track of cervical mucus, that helps too. If you have a 30 day cycle I would start testing one opk a day starting around day 12 and then do twice a day on days 14/15 (or whatever days ... After Fallopian Tube Surgery: TTC, OPK, BBT I refused at first to get into the rigors of what I called “Die hard trying to conceive ( TTC) “. I refused to use ovulation predictor test kits (OPKs), take my basal body temperature (BBT) to chart ovulation, or anything other help with conceiving.A group where you can ask all your BBT related questions! BBT and OPK don't align? So my BBT looks like I O'd three days ago, but my OPK was clearly negative (I check 2-3 times a day during my fertile week), OPK turned strong positive last night... thoughts? Aug 30, 2019 · Women who ovulate and check their basal body temperature (BBT) chart will probably notice a small, but sustained rise in temperature after ovulation, especially after a few months of experience with close monitoring. A woman who is not ovulating will not have that small temperature change. Tracking BBT in addition to cervical mucus can be helpful. Ideally, you should use one that is accurate to 1/10th (98.6) of a degree if you measure in Fahrenheit or 1/100th (37.00) of a degree in Celsius. Use the same thermometer throughout the cycle. If you buy a new one, start using it on day one of the next cycle. Taking your BBT is not too hard.10 – 12 percent chance of conception. 5 – 6 days before ovulation. 0 – 5 percent chance of conception. The most important thing to note here is that you can conceive anytime during the 5 days before ovulation and on ovulation day itself. Within your 6-day fertile window, the 2-3 days before ovulation are your most fertile.Advertisement ...I have also ready in TCOYF that an OPK can show a positive result before, during, and after you O due to varying levels of LH in urine. HTH. EDIT: So, the answer is yes, you could have a temp rise with a +OPK. ~Sweet Girl *8/18/08* c-section ~ Sweet Boy *12/2/10* VBAC ~ Sweet Boy *8/14/12* VBAC~. Nov 1, 2018 · 10 – 12 percent chance of conception. 5 – 6 days before ovulation. 0 – 5 percent chance of conception. The most important thing to note here is that you can conceive anytime during the 5 days before ovulation and on ovulation day itself. Within your 6-day fertile window, the 2-3 days before ovulation are your most fertile. Really considering giving up on OPKs: Only tried OPK strips so far and find it super annoying that you can't test with FMU. I think it is absolutely… Jan 2, 2014 · You don't O on the day of a positive opk. It's 12-36 hours after the positive opk, so that's the reason for the low temps for now. Sometimes you can get a positive opk and not O.
This is my first month using OPK's and I am CD20 or 21 and still no positive. I do tend to have longer cycles usually around 33 days sometimes more and a few times less so I am wondering if that it why. My tests have got a little darker but still nowhere near the control line. I do a test in the afternoon and lately I have been doing one in the .... Pac 12 football statistics
I am still in shock - I got a bfp today. I was desperately hoping I would get af soon (I have only had one pp period so far) so we could officially start ttc with all the bells and whistles (opk, bbt, supplements, etc). I was actually excited for the cramps I have been feeling - I figured she was right around the corner! I don't know how long I will get to hang around here - but for the moment ...BBT shows AFTER O. (You don't get your change on BBT until after you have already O). OPK advised 24-36 hours PRIOR to O. By using OPK and BBT, you should forecast your O date with the OPK and verify you did O via BBT. Whenever you get a few minutes (okay, like 20 or so), I recommend checking out peeonastick.com. This is a very thorough website ...Mar 15, 2017 · A positive opk means your body is gearing up to release the egg. It is possible for the egg not to be released. What usually happens is your body will have another lh surge in a few days to try to release the egg again, resulting in a late cycle. Aug 24, 2022 · Don't drink a lot of liquid during the two hours before testing. Too much liquid dilutes your urine, which could make it more difficult to detect the surge. Read the results within 10 minutes. A positive result won't disappear, but some negative results may later display a faint second color band that would be misleading. Using a salivary ... Ovulation predictor kit (OPK) Ovulation predictor kits look just like the home pregnancy tests but they determine when you are ovulating instead. Unfortunately, different brands vary in their accuracy. If you are finding positive tests with the regular "pee-on-the-stick" kind, then you don't really need the fertility monitor.Jun 28, 2023 · Ovulation tests are easy to use. Ovulation kits work similarly to home pregnancy tests—you simply pee on the test stick, activating a chemical that can detect your LH surge. Many OPKs come as a ... It looks to me like, according to BBT, you O'd on the 2nd of Nov. But the OPK says the 4th.. I think. If it was the 2nd then you may not have BDed within the time frame. When I was trying for my daughter 10 years ago I went by BBT and thought it was pretty accurate. I have heard the OPKs are really accurate, too, though so I don't know. 10 – 12 percent chance of conception. 5 – 6 days before ovulation. 0 – 5 percent chance of conception. The most important thing to note here is that you can conceive anytime during the 5 days before ovulation and on ovulation day itself. Within your 6-day fertile window, the 2-3 days before ovulation are your most fertile.Aug 30, 2019 · Women who ovulate and check their basal body temperature (BBT) chart will probably notice a small, but sustained rise in temperature after ovulation, especially after a few months of experience with close monitoring. A woman who is not ovulating will not have that small temperature change. Tracking BBT in addition to cervical mucus can be helpful. Are you taking your BBT its the only real reliable way to tell if you have Ovulated. But if your getting highs then I would just keep having sex and hoping that you catch O even if you don't get a peak. I'm really sorry this is so frustrating for you. I got my bfp yesterday (yay!!) and If I'm reading my opk/bbt chart right, that's 10dpo. That seems early... does that mean I'm more likely to have twins? Or am i reading it wrong, and I have my dpo wrong? i had a cp last cycle so I'm not sure if that made it wonky.photos: my bfp from yesterday, my bbt...CD 14: 96.94 CD 15: 97.11 CD 16: 97.18 CD 17: 96.81 CD 18 (first positive OPK): 97.08 CD 19: 97.18 CD 20: 97.18 CD 21 (today): 97.26 Is it possible I ovulated the same day as first positive so the CD 17 reading was the dip, and then every day since then has been a little higher?Feb 28, 2021 · See last answer. Amme N. 28/02/2021 at 5:24 pm. After u ovulate you should have 3 consecutive rises in temp... this is mine this month so I know I’ve ovulated and have been strict with timing temp taking this month.. last month I was a bit wishy washy. Edited on 28/02/2021 at 5:25 pm by Amme N. Really considering giving up on OPKs: Only tried OPK strips so far and find it super annoying that you can't test with FMU. I think it is absolutely…In answer toClaire R (1533) Anyone?! Thks! X. Hi Claire, You opk surge usually occurs a day or two before your bbt rise so watch out for it! You then need 3 consecutive high temps to confirm your ovulation on fertility friend then you can get an accurate count on your dpo, good luck! xx..