Pregnancy's effect on circulation - what you need to know
How does pregnancy impact your blood circulation? During pregnancy, your blood volume increases significantly, which affects everything from your breathing to how you regulate body heat. Here's what happens in your body — and how to ease common symptoms like shortness of breath, carpal tunnel syndrome, and Vena Cava Syndrome.
Read time: 2 m
Verified by Anna Reinhold Landaeus
Licensed Personal Trainer - expertise in training during and after pregnancy.
Why does blood volume increase during pregnancy?
When you're pregnant, your blood volume increases by up to 50%. It’s your body’s way of providing enough oxygen and nutrients for both you and your baby. Progesterone also dilates your blood vessels, increasing blood flow to your skin — which can make you feel extra warm and sweaty.
Feeling out of breath while pregnant? Here's what’s happening
As blood volume rises, your heart works harder, often increasing your heart rate. Your body needs more oxygen, which affects your breathing. You might notice:
- Shortness of breath, especially at rest
- A feeling of chest pressure
- Swollen nasal membranes, making nasal breathing more difficult
These changes are normal but can be uncomfortable, especially later in pregnancy when your uterus presses against your lungs.
Carpal Tunnel Syndrome During Pregnancy
Carpal tunnel syndrome is common during pregnancy and usually results from fluid retention compressing the wrist nerves. Symptoms include:
- Numbness in the fingers
- Tingling or aching in the hands
- Trouble gripping items
Ways to relieve it:
- Avoid repetitive wrist motions
- Wear a wrist brace at night
- Keep your wrist straight while sleeping
Vena Cava Syndrome – Dizziness and Nausea While Lying on Your Back
Vena Cava Syndrome happens when the large vein (the inferior vena cava) is compressed while lying on your back, reducing blood return to your heart. Common symptoms include:
- Dizziness or lightheadedness
- Cold sweats
- Nausea
What helps:
- Sleep on your left side
- Avoid lying flat on your back after week 16
- Choose exercises where you're tilted or your hips are lifted
When to contact a healthcare provider:
While mild symptoms are often normal in pregnancy, reach out to your doctor or midwife if you:
- Constantly feel dizzy or nearly faint
- Have trouble breathing when resting
- Have persistent numbness or pain
Also read:
Pregnancy-Related Pelvic Pain – A Challenging Discomfort in Pregnancy
Verified by Anna Reinhold Landaeus
Licensed Personal Trainer - expertise in training during and after pregnancy.
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