Jun 5, 2012 at 7:13 PM. @Destiny_2013, A pos. opk DOES NOT mean u O. It just confirms your lh surge. The only way to confirm O is with temping. U can get a pos. opk and not O. U can also get a neg. opk but temp rise which means u did O. It is possible your body prepared to O but didn't.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. 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."13/11/2017 at 11:33 pm. Dont worry! It's all normal! The ovulation and the temp rise usually takes place a day or two after your first positive opk! Sometimes I only get one day of positive opks, sometimes two. Usually I get a temp rise the second day after the first opk. But once or twice it was in the third day! It's all ok and normal.13/11/2017 at 11:33 pm. Dont worry! It's all normal! The ovulation and the temp rise usually takes place a day or two after your first positive opk! Sometimes I only get one day of positive opks, sometimes two. Usually I get a temp rise the second day after the first opk. But once or twice it was in the third day! It's all ok and normal.Jun 5, 2012 · Jun 5, 2012 at 7:13 PM. @Destiny_2013, A pos. opk DOES NOT mean u O. It just confirms your lh surge. The only way to confirm O is with temping. U can get a pos. opk and not O. U can also get a neg. opk but temp rise which means u did O. It is possible your body prepared to O but didn't. TWW Buddies! Ovulation 26th August. by NewGirl88. 67. Browse more posts.Jun 13, 2023 · 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. OPK and BBT not aligning. Wondering if anyone ever has their BBT and OPK not match up. I use clear blue digital advanced and I got the static smiley on Saturday 4/1. But my BBT didn’t rise until Saturday 4/8, so fertility friend has ovulation day being Friday 4/7. I had ewcm that Friday to Sunday 4/7-4/9.This is usually the case with endometriosis. If you do not ovulate, then you may still experience bleeding that is often mistaken for menstruation. This anovulatory bleeding will be irregular, varying in flow, duration and schedule. Without ovulation and resulting lack of progesterone to balance the effects of estrogen, your uterine lining ...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 ...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.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.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 ...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~.Apr 21, 2023 · 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. My bbt dropped this morning and Iv had ovulation pains all day, so that would predict that Iv ovulated today- as long as I have a temp rise tomorrow which I’m expecting going by last months chart. But on my clearblue opk Iv got flashing smiley no static yet. If it goes static tomorrow that will say ovulation within 24-48 hours.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.For most women, the answer is no. LH rises to tell the body that it is time to ovulate and surges 24-36 hours before the release of an egg. If you don’t see this surge, you probably took the test at the wrong time, ovulated early or late, or are experiencing an anovulatory cycle. Rarely, however, your baseline LH level may be high or low ...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 ... Oct 14, 2017 · When using BBT to try and conceive, Choi says the key is to make sure to have sex starting several days before the anticipated temperature rise. On the other hand, Choi says, OPKs test for the ... 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 ...They are most effective when used together, because OPKs can tell you when ovulation is coming (usually) and BBT can confirm it happened. Not everyone ovulates 12-24 hours from their positive OPK, it can be up to 72 hours after and in around 20% of women (I’m one of them!) ovulation can actually occur prior to/ immediately after the OPK turns positive.Sep 4, 2018 · 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. 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.Jun 5, 2012 at 7:13 PM. @Destiny_2013, A pos. opk DOES NOT mean u O. It just confirms your lh surge. The only way to confirm O is with temping. U can get a pos. opk and not O. U can also get a neg. opk but temp rise which means u did O. It is possible your body prepared to O but didn't.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.Mar 24, 2021 · 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. 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. 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 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 ... 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.Jun 20, 2022 · Personally I do both. Opk predicts BBT confirms. Of the two I like bbt more. I don’t find it difficult at all, but I’m still ttc#1 so no one wakes me up at night. Just set an alarm for the same time every morning and keep the thermometer and your phone or a pencil beside the According to my bbt and my CM, I should be most fertile today, but my daily OPK has been negative. I'm definitely over-thinking this, but it's because I don't think I ovulated at all last month - my chart never showed a sustained rise, my OPK was negative, and we had sex every day for 2 weeks and didn't get pregnant.May 6, 2020 · 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. Apr 14, 2023 · OPK and BBT not aligning. Wondering if anyone ever has their BBT and OPK not match up. I use clear blue digital advanced and I got the static smiley on Saturday 4/1. But my BBT didn’t rise until Saturday 4/8, so fertility friend has ovulation day being Friday 4/7. I had ewcm that Friday to Sunday 4/7-4/9. Advertisement ...Jan 21, 2020 · Cara Guna OPK: boleh start check 2-3 hari selepas period. untuk yang jarang period, disarankan buat BBT (*cara buat BBT ada kat bawah) untuk period yang regular, formula kiraan cycle period – 14 = hari dijangka ovulate. Jadi mula check OPK 2-3 hari sebelum tu. kena check OPK sehingga -ve semula selepas +ve. Hello :) this is a group for ladies who are trying to concieve the miracle of life👣 . Through the hardships, loss, gain and everything in between we will be here to help you through it and support you. Please join our group and help us grow; we want to build our community so everyone's questions can be answered!Jul 17, 2022 · OPK or BBT? Curious to hear others experiences when they were TTC. I have been doing both OPK tests and measuring my BBT for several months and I’m noticing that I’ll get a positive OPK but then my body temperature won’t spike for sometimes up to 4 days later. 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?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.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.Even with a slow rise, a temperature pattern usually becomes apparent after a few days. It can be helpful to consult with other fertility signs such as cervical mucus and cervical position. Ovulation is most likely to occur on the last day of fertile cervical mucus. But with a slow rise it can sometimes be difficult to pinpoint the exact day of ...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.According to my bbt and my CM, I should be most fertile today, but my daily OPK has been negative. I'm definitely over-thinking this, but it's because I don't think I ovulated at all last month - my chart never showed a sustained rise, my OPK was negative, and we had sex every day for 2 weeks and didn't get pregnant.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 ...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. Jan 4, 2017 · Even with a slow rise, a temperature pattern usually becomes apparent after a few days. It can be helpful to consult with other fertility signs such as cervical mucus and cervical position. Ovulation is most likely to occur on the last day of fertile cervical mucus. But with a slow rise it can sometimes be difficult to pinpoint the exact day of ... rose242. Oct 30, 2017 at 2:30 PM. You’re BBT changes throughout the day and you should only check it first thing in the morning before you get out of bed. since you just had a miscarriage your hormones may not be back to regular yet you could have released a surge making the OPK positive however your body failed to ovulate so your ...Mar 24, 2021 · 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. Yes absolutely. If you took the photo 4 times it would probably spit out 4 different numbers 😂 realistically the numbers don’t mean anything, all you’re looking for is a positive OPK, where the test line is as dark or darker than the control line.Yes absolutely. If you took the photo 4 times it would probably spit out 4 different numbers 😂 realistically the numbers don’t mean anything, all you’re looking for is a positive OPK, where the test line is as dark or darker than the control line.Jul 7, 2020 at 9:39 PM. I would count ovulation 12-36 hrs after your Peak result. Thats how I've always done it and I've been successful. I continue to have positive opk for 1 or 2 days after the peak one but i know LH is coming down at that point. And i would BD on ovulation day and the next 2 or 3 days after as well. For most women, the answer is no. LH rises to tell the body that it is time to ovulate and surges 24-36 hours before the release of an egg. If you don’t see this surge, you probably took the test at the wrong time, ovulated early or late, or are experiencing an anovulatory cycle. Rarely, however, your baseline LH level may be high or low ...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! 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 ...Jan 21, 2020 · Cara Guna OPK: boleh start check 2-3 hari selepas period. untuk yang jarang period, disarankan buat BBT (*cara buat BBT ada kat bawah) untuk period yang regular, formula kiraan cycle period – 14 = hari dijangka ovulate. Jadi mula check OPK 2-3 hari sebelum tu. kena check OPK sehingga -ve semula selepas +ve. 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. 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… 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 ...swirl25 member. member. member. My temp rises anywhere between 2 and 4 days after a +OPK. Everyone is different. My OBGYN said this is super normal - your LH surge can either trigger an O right away or a few days later! Lesley0228 member. My O is typically two days after my first +OPK.When using BBT to try and conceive, Choi says the key is to make sure to have sex starting several days before the anticipated temperature rise. On the other hand, Choi says, OPKs test for the spike in luteinizing hormone (LH) that precedes ovulation by a day or two.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... Therefore, BBT and OPK combined will let you know if you are really O'ing. If you are still in doubt then you should have your doc test and see if you are or not. I have cysts and was not O'ing at ...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... 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?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?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.Yes absolutely. If you took the photo 4 times it would probably spit out 4 different numbers 😂 realistically the numbers don’t mean anything, all you’re looking for is a positive OPK, where the test line is as dark or darker than the control line. For most women, the answer is no. LH rises to tell the body that it is time to ovulate and surges 24-36 hours before the release of an egg. If you don’t see this surge, you probably took the test at the wrong time, ovulated early or late, or are experiencing an anovulatory cycle. Rarely, however, your baseline LH level may be high or low ... 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 ... 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. LikeOct 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. 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. Jan 4, 2017 · Even with a slow rise, a temperature pattern usually becomes apparent after a few days. It can be helpful to consult with other fertility signs such as cervical mucus and cervical position. Ovulation is most likely to occur on the last day of fertile cervical mucus. But with a slow rise it can sometimes be difficult to pinpoint the exact day of ... rose242. Oct 30, 2017 at 2:30 PM. You’re BBT changes throughout the day and you should only check it first thing in the morning before you get out of bed. since you just had a miscarriage your hormones may not be back to regular yet you could have released a surge making the OPK positive however your body failed to ovulate so your ...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 ... 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.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 ... Hello :) this is a group for ladies who are trying to concieve the miracle of life👣 . Through the hardships, loss, gain and everything in between we will be here to help you through it and support you. Please join our group and help us grow; we want to build our community so everyone's questions can be answered!Personally I do both. Opk predicts BBT confirms. Of the two I like bbt more. I don’t find it difficult at all, but I’m still ttc#1 so no one wakes me up at night. Just set an alarm for the same time every morning and keep the thermometer and your phone or a pencil beside therose242. Oct 30, 2017 at 2:30 PM. You’re BBT changes throughout the day and you should only check it first thing in the morning before you get out of bed. since you just had a miscarriage your hormones may not be back to regular yet you could have released a surge making the OPK positive however your body failed to ovulate so your ...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.EWCM is not an indicator of ovulation, just that it should be happening soon. 2. It could be seminal or arousal fluids if you have BD in the last 12-24 hours. Most women know this but its worth saying as most couples tracking CM are also BD regularly around the time they think they are going to ovulate. 3.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 ... 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 ...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.
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. . What time domino
When using BBT to try and conceive, Choi says the key is to make sure to have sex starting several days before the anticipated temperature rise. On the other hand, Choi says, OPKs test for the spike in luteinizing hormone (LH) that precedes ovulation by a day or two.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?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. 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.Personally I do both. Opk predicts BBT confirms. Of the two I like bbt more. I don’t find it difficult at all, but I’m still ttc#1 so no one wakes me up at night. Just set an alarm for the same time every morning and keep the thermometer and your phone or a pencil beside theAug 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 ... Sep 3, 2011 · Basically, your negative OPK could mean several things. 1) You haven't gotten your surge yet. 2) You have gotten your surge (probably yesterday) and are ovulating today, but for whatever reason didn't ever see the positive OPK. That could be because you didn't test yesterday, or you may have a really short surge. 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.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.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.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 ...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.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.Advertisement ... .