To be on the safe side, you should watch for them in your urine and report any positive results to your doctor. To test the urine for ketones, you can use a test strip similar to the one used for testing your blood. This test strip has a special chemically treated pad to detect ketones in the urine. Testing is done by passing the test strip through the stream of urine or dipping the strip in and out of urine in a container. As your pregnancy progresses, you might find it easier to use the container method.
All test strips are disposable and can be used only once.
This applies to blood sugar test strips also. You cannot use your blood sugar test strips for urine testing, and you cannot use your urine ketone test strips for blood sugar testing. It is also important to test if you become ill and are eating less food than normal. Your health care provider can advise what's best for you. Yes, despite careful attention to diet some women's blood sugars do not stay within an acceptable range.