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Her glucose level will depend heavily on what she eats. High car and sweet diets increase the blood sugar. You need to do an Oral Glucose Tolerance Test
to confirm how her Sugar control is. These are the standard tests for Diabetes
. This test at Home doesn't matter much. 166 after an hour is not conclusive of much. Kindly get the tests done above to confirm. Watch her diet. Include fresh fruits and vegetables in the diet. She needs to keep a good count of her Foetal movements as well. Discuss with the Gynaecologist on the above points and you could get the right care and management for Diabetes in Pregnancy.