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Published on: 4/7/2025

What Could Cause Sudden Episodes of Extreme Fatigue During Pregnancy?

Sudden episodes of extreme fatigue during pregnancy can be due to normal hormonal changes, anemia, or more serious conditions. It’s best to talk with your healthcare provider if you feel overly tired or if the fatigue comes on suddenly.

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Explanation

During pregnancy, many women feel more tired than usual because of natural changes in the body and extra energy needed for your growing baby. However, if you experience sudden, extreme fatigue, it can be related to several causes. One common reason is anemia, which happens when there aren’t enough healthy red blood cells to carry oxygen. Another possibility is changes in hormones that affect your energy levels. Sometimes, fatigue can signal low blood sugar or thyroid problems that need medical attention. In rare cases, the fatigue might be linked with heart or lung issues, especially if you also have symptoms like shortness of breath or dizziness. Here are some points you can consider:

  • Know what is normal for you, as many women feel tired early in pregnancy.
  • Keep track of any extra symptoms, such as dizziness or chest pain.
  • Always share sudden changes with your healthcare provider.

By sharing these details, your doctor can help determine if the fatigue is due to routine pregnancy changes or if there is another underlying concern. Remember, it’s important to take care of yourself so you can support your baby’s growth and development.

(References)

  • Poole CJ. Fatigue during the first trimester of pregnancy. J Obstet Gynecol Neonatal Nurs. 1986 Sep-Oct;15(5):375-9. doi: 10.1111/j.1552-6909.1986.tb01409.x. PMID: 3639925.

  • Furara S, Maw M, Khan F, Powell K. Weakness in pregnancy - expect the unexpected. Obstet Med. 2008 Dec;1(2):99-101. doi: 10.1258/om.2008.080011. Epub 2008 Dec 1. PMID: 27582795; PMCID: PMC4989714.

  • Quigley J, Keating A, Byrd L. Fatigue and breathlessness in pregnancy: a rare and sinister cause. BMJ Case Rep. 2014 Oct 16;2014:bcr2014205441. doi: 10.1136/bcr-2014-205441. PMID: 25323281; PMCID: PMC4202050.

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