I had 1 hr svreening at 25 weeks, and the result is 137, my clinic adopt the stardanr <130, so I did 3hr GTT 2 weeks later. MM had the 1 hr screen at 21 weeks is too early, should between 24-28 weeks. There are 2 startdands 130 and 140 cut off, and it depends which stardand your clinic uses.
If your clinic uses 140 as the cutoff line, I think you are OK. I failed the one hour test, mine was 141mg. I just did the 3 hour test, hopefully we will pass it this time