What it is
If you are so tired pregnant that you cannot stay awake at your desk, that is first trimester fatigue. It is one of the earliest signs of pregnancy. Progesterone rises fast and acts like a sedative. Your body is also building a whole new organ, the placenta. That work is invisible, but it costs energy.
What's typical
Fatigue often starts around week 5 or 6 and is heaviest in weeks 8 to 10. Most mothers feel a lift around weeks 12 to 14, once the placenta takes over. Energy often dips again in the third trimester. Naps, early bedtimes, and fog are all typical.
What's known
ACOG describes early fatigue as expected and hormone-driven. Low iron, low thyroid, and depression can look like fatigue too, which is why providers check blood work at the first visit.
What helps
- Go to bed when you are tired, even if it is 8 p.m. This is a season, not forever.
- Eat something with protein every three hours or so. Blood sugar dips make the crash worse.
- Move a little. A ten-minute walk often gives back more energy than it takes.
- Hand off one thing a day: dinner, the dishes, the school run.
When to call someone
- Nowfainting, chest pain, or trouble breathing.
- Todayfatigue with a racing heart, dizziness when you stand, or feeling cold all the time.
- At your next visittiredness that does not lift after week 14, or low mood with it. Ask about your iron and thyroid results.
Who helps
Tools: Due Date Calculator
Related
- Nausea and vomiting in pregnancyPregnancy: Your Body
- Low iron and anemiaPregnancy: Your Body
- Can't sleep: pregnancy insomniaPregnancy: Your Body
- Depression during pregnancyPregnancy: Mind and Life
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Sources
- American College of Obstetricians and Gynecologists — Patient FAQ on changes during pregnancy
- NHS — Tiredness and sleep problems in pregnancy
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