Pregnancy's impact on circulation - what you need to know

Why does blood volume increase during pregnancy?

While pregnant, your blood volume can increase by up to 50%. This helps ensure both you and your baby receive enough oxygen and nutrients. The hormone progesterone also affects your blood vessels, increasing blood flow to the skin – which can make you feel warmer and sweatier than usual.

Short of breath during pregnancy? Here’s why

As your blood volume increases, your heart has to work harder, often causing your heart rate to rise. Your body needs more oxygen, which can affect your breathing. You may experience:

• Shortness of breath, especially at rest
• A feeling of pressure in your chest
• Swollen nasal passages, making it harder to breathe through your nose

This is completely normal but can feel uncomfortable – particularly in the later stages of pregnancy when your uterus presses against your lungs.

Carpal Tunnel Syndrome in Pregnancy

Carpal tunnel syndrome is common in pregnancy and is often caused by fluid retention pressing on the nerves in your wrist. Symptoms may include:

• Numbness in the fingers
• Tingling or pain in the hands
• Difficulty gripping objects

Tips for relief:

• Avoid repetitive wrist movements
• Use a wrist splint at night
• Keep your wrist straight while sleeping

Vena Cava Syndrome – dizziness and nausea when lying on your back

Vena Cava Syndrome occurs when the large vein (vena cava) is compressed while lying on your back, reducing blood flow to the heart. Common symptoms:

• Dizziness or feeling faint
• Cold sweats
• Nausea

How to relieve it:

• Sleep on your left side
• Avoid lying flat on your back after week 16
• Opt for exercises where you’re tilted or with elevated hips

When should I seek medical advice?

Mild symptoms are often normal during pregnancy, but you should contact your midwife or GP if you:

• Feel constantly dizzy or faint
• Struggle to breathe even at rest
• Experience numbness or pain that doesn’t go away

Also read:
Pregnancy-related Pelvic Pain – A Painful Challenge During Pregnancy