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Breathlessness

You may feel even more short of breath in the 3rd trimester. Why? As your baby grows larger and takes up more and more of the space inside your abdomen, other organs are squeezed and pushed aside. Your lungs don't have the room they need to expand with a full breath. Your diaphragm can't offer much help because it is compressed too. (This doesn't cause any permanent damage; after your baby is born, your organs will slip right back into their prepregnancy position.)

Don't worry. As always, Mother Nature has provided for your baby. Although you may feel as if you're getting less air, high levels of progesterone help you take deeper breaths and get more oxygen into your blood. And because your blood volume is higher during pregnancy, more oxygen passes back and forth across the placenta as you inhale and exhale.

Easing symptoms. If you become winded during the day, slow down for a few minutes. Your breath should return. Make an effort to sit up straight during the day to give your lungs more breathing room. You can also consciously breathe in a way that raises your rib cage; check that your ribs push out against your hands as you inhale deeply. At night you may feel as if you're hyperventilating. You can ease that sensation by sleeping with your head raised on more than one pillow. If your breathlessness is accompanied by chest pains, call your doctor right away.

Luckily most women get relief from this breathlessness before childbirth. When your baby's head drops into your birth canal -- about 2 or 3 weeks before delivery -- you'll have more room for your diaphragm and breathe more easily.

Asthma sufferers. Women with asthma sometimes find that their symptoms worsen during the 3rd trimester. If your asthma gets worse, talk with your doctor. Many asthma medicines are considered safe during pregnancy. Doctors usually prefer to prescribe inhaled medications because they have a more localized effect and work well; if you discover that your chest feels tight, however, tell your doctor.

It might be tempting to dismiss any 3rd-trimester breathlessness as normal, but if you experience shortness of breath that's sudden, severe, or associated with chest pain or a faster pulse, get medical help immediately. This could mean that a blood clot has settled in your lungs; it's a rare but dangerous occurrence among pregnant women, especially those with blood clots in their legs.

Be aware, too, that breathing problems can be caused by pneumonia. Usually accompanied by fever, chest pain, and cough, pneumonia is the third-leading cause of death among pregnant women. Pneumonia can be viral or bacterial; with either one, potential complications can include respiratory failure, premature delivery, or infections that can harm your unborn baby.

Originally published in You & Your Baby: Pregnancy.

All content on this Web site, including medical opinion and any other health-related information, is for informational purposes only and should not be considered to be a specific diagnosis or treatment plan for any individual situation. Use of this site and the information contained herein does not create a doctor-patient relationship. Always seek the direct advice of your own doctor in connection with any questions or issues you may have regarding your own health or the health of others.