Pregnancy Week By Week

6 Weeks Pregnant: Development, Symptoms and Care

At 6 weeks pregnant, nausea, tiredness and changes in smell or appetite can start making everyday life harder. Other people have few noticeable symptoms. The embryo is developing quickly, but the amount of discomfort you feel is not a way to measure that development.

How 6 weeks is counted

Pregnancy weeks are usually counted from the first day of your last period, not conception. With a typical 28-day cycle, 6 weeks pregnant is roughly 4 weeks after conception. Cycle variation can change this estimate.

Your baby’s development at 6 weeks

Small limb buds are appearing where the arms and legs will develop. The neural tube, the early structure involved in the development of the brain and spinal cord, is closing around this stage. The developing heart is also active. A week-by-week description is an approximate guide, not a checklist to use to interpret your own scan.

What may be happening in your body

Ordinary smells may suddenly feel unpleasant, and foods you usually enjoy may be difficult to face. Breast tenderness and tiredness can continue. Symptoms can differ from a previous pregnancy, so comparison is not a reliable health check.

Feeling sick is worth discussing even if you are not vomiting. If you cannot eat or drink enough, are losing weight or feel increasingly weak, you need help rather than a stricter meal plan.

Making daily life easier

Try small meals or snacks and avoid smells that trigger nausea. Asking someone else to cook can help if cooking smells are the problem. Rest breaks may be more useful than trying to push through the day at your usual pace.

A GP or midwife can discuss anti-nausea treatment that is suitable in pregnancy. Check before starting medicines or herbal products, and do not stop existing prescription treatment without medical advice. Continue the pregnancy supplements recommended for you.

What an early appointment or scan can tell you

Your GP can review your health, estimate your due date and arrange initial tests and maternity referrals. Mention pain, bleeding, a previous ectopic pregnancy or fertility treatment so the plan reflects your circumstances.

There is no promise that a 6-week scan will show a heartbeat. Dates can be uncertain and early scans sometimes need repeating. If the pregnancy’s location or development is unclear, ask exactly when to return and who will explain the results. An inconclusive scan needs follow-up; new or worsening symptoms need urgent assessment while you wait.

Our ectopic pregnancy guide explains why checking the location matters.

When to seek medical help

In Australia, call 000 for severe abdominal pain, heavy bleeding, fainting, collapse or feeling very unwell. Go to an emergency department immediately for shoulder-tip pain, one-sided or worsening lower abdominal pain, or dizziness. An ectopic pregnancy can cause internal bleeding without heavy vaginal bleeding. Do not wait for a positive test or your next appointment. Do not drive yourself if faint or unwell.

Contact your GP or midwife straight away for other bleeding or cramps. Seek urgent medical help if vomiting means you cannot keep fluids down, or you have fever. If your usual clinician is unavailable, seek urgent care rather than waiting.

Read more about bleeding in early pregnancy and possible miscarriage symptoms. Symptoms need assessment; they do not establish a diagnosis on their own.