There is no definitive treatment for Type 1 diabetes, but if you have this condition, you will always need to take insulin.
It isn't always necessary for Type 2 diabetes to be treated with insulin, but your diabetes specialist will be able to tell you for sure. In many cases, it can be controlled with a careful combination of healthy eating, physical activity and hypoglycemic drugs.
If you have diabetes while you're pregnant, all you have to do is eat regularly and check your blood sugar levels 4-6 times a day. Are you finding it hard to hit the glycemic target recommended by your specialist? Then you might need insulin, so talk to your doctor.
If you're considered to be at high risk of getting diabetes, you'll need to maintain the right life-style, which means: eating in a healthy balanced way without gaining weight, and doing regular physical activity for at least 30 minutes a day, 5 days a week. These are two minor changes that reduce the risk of onset of diabetes by 58%. It might seem trivial, but an ounce of prevention is worth a pound of cure.