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You may eat well washed fresh fruits and vegetables, drink plenty of water, exercise daily by walking for about 20 minutes as much is possible. Avoid eating high fat diet like fried stuff, junk food, colas. In pregnancy
the minimum weight you need to gain is 1 kg in the first 3 months, 5 kg in the next 3 months and 5 kg in the last 3 months. Keep a watch on your weight as you go for your regular Antenetal checkups with your Doctor.