Tiredness and shortness of breath in pregnancy: what your body is telling you

You went to bed early last night, but you woke up tired again this morning. Climbing the stairs leaves you out of breath. This is very common in pregnancy, and most of the time nobody is to blame: your body is doing extraordinary work right now. Still, a few signs deserve a separate look.

Why is the tiredness so intense?

In the first trimester progesterone rises, which can make you sleepy and drained. At this stage the body is building the placenta and increasing blood volume at the same time. The first and third trimesters are when tiredness is most common. In the second trimester, many people regain a little energy.

Other things that can add to tiredness:

• Nausea and not being able to eat enough
• Broken sleep, getting up often to pass urine, not finding a comfortable position
• Iron deficiency or anaemia
• Emotional load, worry, more responsibilities at work and at home
• Low blood pressure or blood sugar swings

Why does breathlessness happen?

In pregnancy, progesterone stimulates the breathing centre in the brain, so you breathe deeper and more often. This is a natural adjustment that supports oxygen delivery to the baby, but it can sometimes feel like you cannot get enough air. Increased blood volume also puts extra load on the heart. In later weeks, the growing uterus pushes the diaphragm upward, leaving the lungs less room to expand.

Mild breathlessness can appear when talking, climbing stairs or lying down, and is mostly harmless. Many people feel somewhat better in the last weeks when the baby settles lower.

What you can do

• See rest as a need: Short breaks through the day, and if possible a 20–30 minute nap.
• Eat regularly and in balance: Small, frequent meals reduce blood sugar swings. Iron-rich foods (red meat, pulses, leafy greens) and sources of vitamin C make a good base; whether you need a supplement is for your doctor to say after looking at a blood test.
• Keep gentle movement going: Short walks raise energy in many people. A pace at which you can still talk is suitable.
• Adjust your position: Lying with your head raised, lying on your left side or sitting upright can make breathing easier.
• Ask for help: Sharing housework is not laziness, it is smart energy management.
• Breathing practice: Slow belly breathing helps some people.
• Break preparations like the hospital bag list and birth plan into small steps; you do not have to finish everything in one day.

About anaemia

A full blood count is part of routine check-ups. Anaemia is common in pregnancy and is often treated with simple measures. If your tiredness never lifts, or comes with paleness, palpitations or dizziness, tell your doctor; do not wait for the next scheduled visit.

Small steps that make daily life easier

• Work out your most energetic hours and place heavier tasks there.
• Break chores like shopping or cleaning into parts, and do not hesitate to postpone some.
• If you work, talking openly with your employer or team about being able to take breaks can help.
• Switching off screens earlier at night and keeping the room cool and dark makes sleep easier.
• Use a support pillow in bed; a pillow between the knees helps many people.
• Remember that tiredness is a natural part of pregnancy; the thought that you should be doing more is a burden you do not need.

When to contact your doctor

• Breathlessness even at rest, or breathlessness that starts suddenly
• Chest pain, palpitations, fainting or feeling faint: go to the emergency room or call 112
• A bluish colour of the lips or fingertips
• Swelling, redness or pain in one leg (especially together with breathlessness, get seen right away)
• Cough, fever, wheezing or phlegm
• Tiredness with marked paleness, constant dizziness, sudden swelling of hands and face, headache and blurred vision
• Mild breathlessness that is getting worse or stops you from doing daily tasks
• A long-lasting low mood, loss of interest or hopelessness can also show up as tiredness; talk to your doctor

This article is for information only; your doctor's or midwife's advice is what counts for your personal situation.