7 Weeks Pregnant: What to Expect

At 7 weeks pregnant you are firmly in the first trimester, and although your bump will not be showing yet, there is a remarkable amount happening inside. Your baby is now about the size of a blueberry (about 10mm), and your body is laying the groundwork for the months ahead. Here is a full picture of what to expect this week.

Your Baby This Week
Your Body This Week
Symptoms You May Notice
Lifestyle and Self-Care
Looking Ahead

Your Baby This Week

Your baby is growing rapidly, though still tiny. The neural tube, which will become the brain and spinal cord, is forming, and the foundations for all major organs are being laid down. A tiny heart may already be beginning to beat, though it is often too early to detect on a scan. Limb buds are starting to appear, and the basic structure of the face is taking shape with dark circles where the eyes will eventually be.

The placenta is also developing, preparing to take over the job of nourishing your baby from around week 12. Until then, the yolk sac provides essential nutrients.

Your Body This Week

Your body is undergoing significant internal changes. Blood volume is increasing by up to 50% over the course of pregnancy, which means your heart is working harder. You may notice you feel warmer than usual and that your complexion looks flushed. Your cervix has sealed with a mucus plug to protect your growing baby from infection.

Hormones, particularly hCG, progesterone, and oestrogen, are surging, and these are responsible for many of the symptoms you feel. Your breasts may feel fuller and tender as milk ducts begin to develop, and you might notice your waistband feels snug even though there is no visible bump.

Symptoms You May Notice

Expect a mix of physical and emotional shifts at 7 weeks:

Nausea and food aversions - certain smells and foods may suddenly become unappealing
Fatigue - an overwhelming tiredness that does not always lift with rest
Breast changes - tenderness, darkening areolas, and tingling sensations
Frequent urination - your kidneys are working overtime
Mood swings - hormonal shifts can leave you tearful or irritable
Bloating and constipation - progesterone relaxes your digestive muscles, slowing things down
Heightened smell - previously unnoticed scents may feel overpowering

Lifestyle and Self-Care

This is the time to build healthy habits. Take 400 micrograms of folic acid daily to support neural tube development, and consider a vitamin D supplement. Eat a balanced diet rich in fruit, vegetables, whole grains, and lean protein. Stay well hydrated, aim for gentle exercise most days, and prioritise sleep.

Avoid alcohol, smoking, recreational drugs, and high-mercury fish. Limit caffeine to under 200mg daily. If you take prescription medications, check with your GP that they are safe in pregnancy.

Looking Ahead

Over the coming weeks your symptoms may intensify before they ease, and you will likely have your booking appointment with a midwife between weeks 8 and 10. Your first ultrasound scan, the dating scan, typically takes place between 10 and 14 weeks. In the meantime, start thinking about telling close family or friends, and begin a pregnancy journal if you would like to capture the journey.

Every pregnancy unfolds differently, so try not to compare yourself to others. Trust your instincts, rest when your body tells you to, and lean on your healthcare team whenever you need reassurance.