At what week did you do it? How long did it take in total? Are there any important nuances to ensure…

From 24-28 weeks, you don't need to prepare anything. I bought the glucose myself.

I did it at 26 weeks, didn't prepare at all, and it wasn't quick! Especially if you have to give the sample within an hour after the glucose load and then again later.

I did it at 24 weeks, and it took 3 hours. I gave blood on an empty stomach at 8 AM, then I drank the glucose, and gave blood again at 9 AM and 11 AM.

I had mine done at 25 weeks. The only thing the doctor said was that after 7 AM, I couldn't eat, only drink water. I gave blood on an empty stomach, then waited another 2 hours, gave blood again, and went home happy to eat.

They set a date, and that was it. I stuffed myself with chocolate at night, and took a test in the morning.
Not good news.
Turns out I need to stick to a diet 😁

three pregnancies and I wrote a refusal every time

NATALI Did you lie down between blood draws?

I don't remember exactly, somewhere in the middle of my pregnancy… the whole thing took about three hours