I didn't have any symptoms and still had it. Well, unless a larger fundal height at a midwife check-up is a symptom, because that is what led to the test being done, even though my midwife did urge me to take it at 28 weeks and I didn't.
Yes that is one thing my midwife wants to watch out for and she mentioned there are other indicators and simple tests.
Actually I'm against the idea of skipping if there is no reason to suspect it. I had no reason to suspect having GD in my last pregnancy. No history in the family at all, wasn't in the weight range. My urine samples never showed any sign of it either.
I only had the GTT due to measuring 2 weeks over at 32 weeks, which a lot of midwifes won't even do as it could be nothing. It was due to that scan that I was found to have excess fluid, in the dangerous range, and the GTT was done to find out why it had happened. I was lucky as mild was easily controlled by reducing both sugar and carb intake.
Measuring ahead was one thing my midwife mentioned as well as alternative tests to the Oral Glucose Test.
My diet already matches a diet that would control minor Gestational Diabetes btw. If it was major, according to my midwife there would be signs and symptoms or something out of the ordinary when monitoring me.
The whole idea for the GTT is to find out how the body deals with the sugar overdose. There will be no false positive for those having the 2 hr test, as it's plenty of time for the body to deal with it unless positive for GD, which also works for those with low carb/sugar diets.
Many people had to actually do the home test since they failed the other tests and passed when pricking their own fingers. I told my midwife I'd rather monitor my blood sugar at home. A friend of mine who works at a clinic for diabetics instructed me on what to do and what to watch out for.
Glucola also carries risks...the ingredients are harmful and the test is said to be outdated and inaccurate by many professionals. There are so many better alternatives these days...but this is cheap and quick.
I have collected a few links regarding the issues I mentioned:
Harmful ingredients in Glucola:
"BVO contains bromine, which is known to interfere with thyroid function."
https://avivaromm.com/dont-drink-glucola-gestational-diabetes
https://www.mommypotamus.com/natural-alternatives-to-the-gestational-diabetes-test/
Glucola is outdated, better methods are available:
https://m.care.diabetesjournals.org/content/25/10/1883.long
False Positives for low carbers:
https://robbwolf.com/2013/05/15/6-letter-word/
https://robbwolf.com/2008/06/25/gestational-diabetes/
https://pilatesnutritionist.com/i-failed-the-glucola/
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I know a thing or two about Bromine. And especially with my past conditions like Hashimotos or a Prolactinoma I would like to avoid it. I'm glad my conditions are gone.