No, 168 is not a good number. Ideally at 1 hour your blood sugars will be less than 140.
How was the 2 hour number? And the fasting number?
Dietary management may be sufficinet, but it will be important to closely monitor during the pregnancy. Usually if diet doesn't keep it under control, insulin is used. Don't be scared of this, if it is required, as insulin is a wonderful and very effective tool for managing blood sugar.
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