7 Weeks Pregnant: Symptoms, Baby Development, First Scan and What's Normal

At 7 weeks of pregnancy, your baby is about the size of a blueberry, roughly 10 mm from head to bottom, and its heart has started beating at around 120 to 160 beats per minute. You are likely to have nausea, tiredness, tender breasts and frequent urination. A first ultrasound is usually done between 6 and 9 weeks to confirm that the pregnancy is in the uterus, check for a heartbeat and set your due date. Light spotting can happen, but heavy bleeding, severe one-sided pain or fainting needs urgent care.

This guide explains how weeks of pregnancy are counted, what is happening to your baby and body this week, what the first scan shows, what to eat and avoid, which tests your doctor may suggest and the signs that mean you should not wait.

How "7 weeks" is counted

Doctors count pregnancy from the first day of your last menstrual period (LMP), not from conception. At 7 weeks, you have completed 6 weeks and are in your 7th week. Your baby is actually only about 5 weeks old from conception.

Example: if your last period began on 10 March 2026, you are 7 weeks pregnant on 28 April 2026 (49 days later), and your due date is 15 December 2026.

If your cycles are irregular or longer than 28 days, your actual stage may differ, and the scan will adjust it. See our guides on calculating your due date and why scan dates differ from LMP dates.

Your baby this week

• Size: about 9 to 12 mm in crown-rump length, similar to a blueberry.
• Heart: has divided into chambers and beats at roughly 120 to 160 beats per minute, which can be seen on a transvaginal scan.
• Brain and face: the brain is developing quickly, and small pits that will become the nostrils, eye lens and ears appear.
• Limbs: arm and leg buds are growing and will soon develop paddle-like hands and feet.
• Other organs: the lungs, liver, kidneys and digestive tract are forming, and the neural tube (the early spine and brain) has closed.
• Placenta: growing and starting to take over nourishment from the yolk sac.

Important: the first 8 to 10 weeks are when organs form. That is why avoiding alcohol, smoking, unprescribed medicines and certain infections matters now.

Your body this week

Many women have symptoms, and some have almost none. Both are normal.

Common symptoms

• Nausea or vomiting ("morning sickness"): can happen at any time of day. It often peaks between 8 and 12 weeks.
• Tiredness: progesterone makes you sleepy, and your body is working hard.
• Breast tenderness: swollen, sore breasts, darker areolae.
• Frequent urination: increased blood flow to the kidneys and pressure from the growing uterus.
• Bloating, gas and constipation: progesterone slows digestion.
• Food aversions and cravings, and a heightened sense of smell.
• Mood swings: hormones, tiredness and worry can make you tearful or irritable.
• Mild cramping: like period cramps, as the uterus stretches.
• Light spotting: about 1 in 4 women have some bleeding in the first trimester. Most go on to have healthy pregnancies, but any bleeding should be mentioned to your doctor.
• Headaches and dizziness.
• Increased saliva or a metallic taste.

Symptoms you shouldn't ignore

See a doctor immediately for:

• Heavy bleeding (soaking a pad an hour) or passing clots or tissue
• Severe or one-sided lower abdominal pain
• Shoulder-tip pain, dizziness or fainting (could signal an ectopic pregnancy)
• Fever or foul-smelling discharge
• Vomiting so severe that you cannot keep fluids down for 24 hours, are losing weight or are passing very little urine
• Pain or burning when you urinate
• Sudden severe headache

The first scan

When is it done?

Many doctors schedule the first ultrasound between 6 and 9 weeks, especially if there is bleeding, pain, a history of ectopic pregnancy or miscarriage, irregular cycles or fertility treatment. In others, it may be done at 11 to 13 weeks with the first-trimester screening.

What it looks like

At 7 weeks, a transvaginal scan (a slim probe passed gently into the vagina) gives a clearer picture than an abdominal scan. It is not painful, though you may feel slight pressure. Before this stage, an abdominal scan may not show much.

What the scan checks

• Location: is the pregnancy inside the uterus (ruling out ectopic pregnancy)?
• Gestational sac and yolk sac: present and normal in size and position.
• Embryo: measured as crown-rump length to date the pregnancy.
• Heartbeat: flickering of the heart, seen from about 6 weeks. Its rate is measured.
• Number of babies: one, or more than one.
• Uterus and ovaries: fibroids, cysts and the corpus luteum (the temporary structure that produces progesterone).
• Bleeding: a small collection of blood near the sac (subchorionic haematoma) is sometimes seen, and often settles.

What if no heartbeat is seen?

At 7 weeks you should usually see a heartbeat, but your dates could be wrong. If the scan is too early, your doctor will repeat it in 7 to 10 days. A heartbeat that is absent in an embryo of 7 mm or more is a concerning sign, and the doctor will explain the next step carefully. Don't draw conclusions from one early scan without your doctor's interpretation.

Heart rate figures

At 6 weeks, the heart rate is often around 90 to 110 beats per minute and rises to about 140 to 170 by 9 weeks. A slightly lower or higher number at 7 weeks is not necessarily a problem.

Medicines and supplements

• Folic acid (as prescribed by your doctor) is important in early pregnancy to prevent neural tube defects. If you aren't already taking it, ask your doctor today.
• Prenatal vitamins: your doctor may recommend them.
• Vitamin D, iron and calcium: based on blood tests.
• Progesterone supplements: may be prescribed in certain situations, for example bleeding with a history of miscarriage. Only take them as directed.
• Don't self-medicate. Check any medicine, including painkillers, cough syrups, herbal remedies and Ayurvedic products, with your doctor first.
• Nausea: small frequent meals, ginger, vitamin B6 and other medicines may be advised by your doctor. Ask before using.

What to eat and drink

• Small, frequent meals, every 2 to 3 hours. Dry snacks such as crackers or toast, eaten before getting out of bed, can reduce morning nausea.
• Fluids: sip water, coconut water, buttermilk, clear soups or lemon water through the day.
• Fruit and vegetables: wash them well.
• Protein: dal, curd, paneer, eggs (fully cooked), milk, nuts and, for non-vegetarians, well-cooked chicken and fish low in mercury.
• Whole grains: roti, oats, brown rice.
• Avoid: raw or undercooked eggs and meat, unpasteurised milk and soft cheeses, raw papaya and large amounts of pineapple (traditionally avoided; follow your doctor's guidance), high-mercury fish, excess caffeine (keep below about 200 mg a day, roughly one to two cups of tea or coffee), alcohol, tobacco, and street food of doubtful hygiene.

You don't need to eat for two. In the first trimester, you need no extra calories.

Daily life

• Rest when you can, and sleep early.
• Walk gently for 20 to 30 minutes if you feel well and your doctor has not advised bed rest.
• Work: most women can work normally. Tell your doctor if your job involves heavy lifting, long hours of standing, chemicals or radiation.
• Travel: short trips are usually fine, but check with your doctor if you have bleeding or a high-risk pregnancy.
• Sex: is generally safe unless your doctor has advised otherwise.
• Hot baths, saunas and heavy exercise: avoid overheating.
• Emotional health: pregnancy can bring joy and anxiety together. Talk to your partner, family or doctor.

Tests your doctor may suggest

• Blood group and Rh factor
• Haemoglobin and complete blood count
• Blood sugar
• Thyroid function (TSH)
• Urine routine and culture
• Viral markers (HIV, hepatitis B, HCV) and syphilis screening
• Rubella immunity, where relevant
• Vitamin D and B12
• Early ultrasound
• Later: first-trimester screening at 11 to 13 weeks, anomaly scan at 18 to 20 weeks, glucose test at 24 to 28 weeks

Common worries at 7 weeks

• "I don't feel pregnant." Symptoms vary and can come and go. It isn't a sign of a problem by itself.
• "I had a drink before I knew." It's common. Stop now and speak to your doctor without guilt.
• "I had spotting once." Mention it and, if you have bleeding, ask for a scan.
• "I'm worried about miscarriage." Early pregnancy loss is common (roughly 10 to 15 percent of known pregnancies), and in most cases happens because of chromosomal problems that nobody could have prevented. Once a heartbeat has been seen, the chance of loss falls considerably.
• "Can stress harm the baby?" Normal day-to-day stress does not cause miscarriage.

Frequently asked questions

What is the size of the baby at 7 weeks?

About 10 mm, roughly the size of a blueberry.

Can you see the heartbeat at 7 weeks?

Usually yes, on a transvaginal scan. It is often visible from about 6 weeks.

What symptoms are normal at 7 weeks pregnant?

Nausea, tiredness, tender breasts, frequent urination, bloating and mood swings. Mild cramps and light spotting also occur.

Is cramping normal at 7 weeks?

Mild, period-like cramps are common. Severe, one-sided or persistent pain needs a doctor.

Should I have a scan at 7 weeks?

It's a good time for the first scan, particularly if you have bleeding, pain, irregular cycles or a history of ectopic pregnancy or miscarriage.

What should I avoid at 7 weeks pregnant?

Alcohol, smoking, undercooked foods, unprescribed medicines, high-mercury fish and excessive caffeine.

How much weight should I gain by 7 weeks?

Little or none. Many women lose a little weight from nausea in the first trimester.

When to see a doctor

Book your first antenatal visit if you haven't already. Seek urgent care for heavy bleeding, severe or one-sided pain, shoulder-tip pain, fainting, fever, or vomiting that prevents you from keeping fluids down.

Care at Prakash Hospital Noida

Whether you live in Sector 18, Sector 62, Greater Noida West, or anywhere nearby, Prakash Hospital Noida is a trusted name for antenatal care and early pregnancy scans in Noida. Our obstetricians confirm your pregnancy, set your dates and support you week by week.

To book a consultation, call the number.

Sources: Standard obstetric references on embryonic development and early pregnancy ultrasound; American College of Obstetricians and Gynecologists patient guidance on early pregnancy and nausea. Figures such as crown-rump length and heart rate are typical ranges.

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