Hi, high ketones means you are burning fat. This is not unusual in pregnancy. Are you diabetic? Most important will be to control your blood sugars and keep them in the target ranges.
When I was pregnant I always had high keetones in the morning (fasting). This is quite normal and is only a concern if your blood sugars are also high.
best you test your ketones a few hours after eating.
Hope this answers your question .
I am pregnant and they have been below moderate or high. They only told me to test once per day in the morning. It just feels like so much tontest 4 times daily after I eat, test in the morning and exercise.