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Intense thirst during pregnancy

by Peg Plumbo

question
I am four-weeks pregnant and have been incredibly thirsty. I have trouble sleeping at night because I wake up with a dry mouth and then have to go to the bathroom because I have drunk so much water. Is this normal?

answer
Thirst is usually related to the amount of water your body is losing through urination, perspiration and evaporation. During pregnancy, your metabolic rate increases so you are losing larger amounts of water. Your body is also conserving water, preparing for added blood volume and for the increased demands of pregnancy. Increased thirst is a necessary adaptation that encourages you to drink more and can be very normal.

When thirst is excessive, however, doctors may begin to think about diabetes mellitus. Typically you would also experience fatigue and frequent urination but these symptoms are often present in pregnancy without diabetes as well.

If you have a previous history of gestational diabetes or a close relative with diabetes, you may wish to talk to your doctor to check on this problem. All pregnant women are screened in some way for gestational diabetes (GDM) between 24 and 28 weeks.

While thirst may be normal, it is worthwhile to mention it to your doctor.

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