How likely is it to fail the 1 hour glucose test and pass the 3 hr.?

I am 6 weeks and 4 days pregnant. I failed the 1 hour glucose test for gestational diabetes last week with an ending glucose level of 188. I’m going back in 3 days for the 3 hour glucose test. Is it likely that I will fail that one too? Or is failing the 1 hour test common? Thanks for any input.
Yes, I was tested this early b/c I’m at high risk b/c I’ve had 2 children that weighed over 9 pounds. Also, this glucose level was on an empty stomach.

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Filed under: Glucose Blood Testing

21 comments on “How likely is it to fail the 1 hour glucose test and pass the 3 hr.?

  1. cherrydr.pepper on said:

    Unfortunately I don’t have any good news for you, I thought I did tell I read that 188 was your fasting. My first glucose test was not a fasting and it was 151 which is 11 points over the want of 140. My 3 hour test which started with a fasting I passed with flying colors, I had this test at 14 weeks because of history in family of diabetes. I just took my hour test a couple of weeks ago again, not fasting and was 146 and had to retake the 3 hour test again and passed with flying colors. I am afraid with your numbers being so high on a fasting that it doesn’t look good, but hey you never know, everybody is different. Good luck!!!

  2. berrel on said:

    I think it depends on how high the 1hr. was. My one hour was 201, so they didn’t even have me bother with the 3-hr, just went right to diabetes management. I hope you pass!

  3. Michelle H on said:

    It’s possible, especially if you also ate right before the test in addition to that lovely syrup they give you. Try not to eat too much before you go in for the next test. Good luck!

  4. Wow you are testing very early. Most women do that at 24-28 weeks. Many woman fail the 1 hr and pass the 3 hr it just depends.

    I’m guessing you were tested that early because you are high risk……….so there is a bigger chance you will fail the 3 hr test.

    Good luck!!

  5. Natalia D on said:

    I failed my first one badly (196). Watched my diet before going for the 3 hour test and did great (76 believe). I did not have preg-diabetes and my baby had good glucose levels when born. I’m a sweets junkie and was extremely surprised that I passed the test. You should watch for sugars in juices, chocolate, ice cream, etc. Even though I cut down on sweets I was getting lots of sugar from juice, esp orange juices and fruits. (Went crazy of these) My OB advised to mix juice with water 50/50 or 60/40. Less (no) sugar in tea or coffee, even sugar substitutes are bad (splenda). You are better off having real sugar. I still enjoyed an occasional brownie and ice cream, try sugar free ice cream they are half decent right now. It really is worth it knowing that you baby will be fine. Congratulations and good luck.
    P.S. Ask the person giving you the test what is better to avoid or to eat to reduce sugar in your situation . I got my info form him and my OB.

  6. emery_sage on said:

    I failed the one hour with a 160 but passed the three hour but i wasn’t a high risk or anything. i know a lot of people who fail the one hour but pass the second.

  7. Lina B on said:

    I failed the 1 hour but passed the 3 hour

  8. LaRae L on said:

    if it was on an empty stomach then i highly doubt you will pass the 3 hour test. a non-diabetic person takes about an hour after eating to produce enough insulin to average out their blood sugar. sorry to say this but just be prepared to hear you have gd.

    as long as you avoid a high intake of carbs you will be on track. and maybe talk to your doctor about seeing an endocrinologist as well if you do have gd, espcially since its this early on in your pregnancy.

  9. applecrisp on said:

    Eat some eggs or something else high in protein and low in carbs before you test. All three of my children were big and I am very over weight ( I was 33 when I got pregnant with my third) I had 3 glucose tests with my third and pass each one.

  10. Just follow the instructions about carb loading two days before the test and don’t eat or drink anything after midnight the morning of the test. I failed the 1 hour, then passed the 3hour. One whole month later the hospital rec commended that I take the 3-hour test a second time because the twins are big and I passed the 3-hour test a second time. Just make sure you follow the instructions about carb loading and then fast. You’ll have a better chance of knowing the results are accurate if you follow the instructions.

  11. Regarding the last comment about carb loading. With my first pregnancy I failed the one hour test, I figured it was due to me eating too many sweets the day before (it was Easter and I didnt know better). They told me to carb load 3 days before my test and I passed the 3 hour test. My second pregnancy thank God I passed right away with the one hour but ended up with a 9.6 lb healthy baby girl.
    Now on to my third pregnancy. I failed both tests and now theyre saying I have GD. My fasting level was good – 89 but two middle ones were over 200. I asked them before the test if I should follow the carb loading diet and they told me not to. So I didnt and I ended up failing..
    I wish I wouldve just done it…now I have to test my BG many times a day and keep a journal. I didnt start doing it yet bc I just got diagnoses two days ago and my meeting with the dietician is on Monday. I will check my blood sugar and find out myself soon I guess. Till then, I have cut out all sugar, white bread, rice, and have actually lost 4 lbs just from the stress of this. I hate it when each DR recomments something different..

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