Trimester 1 · Pregnancy

Week 9 of pregnancy

Your baby is now about the length of a nappy pin, roughly twenty-two millimetres from crown to rump and officially a foetus. They’re looking more human every day as growth races ahead.

About the size of
Nappy Pin
Length
22 mm
Weight
Less than 2 g
Clinically reviewed by The Window to the Womb Clinical Governance Team · Last reviewed June 2026

👶Your baby this week

Your baby is now about the length of a nappy pin, roughly twenty-two millimetres from crown to rump and officially a foetus. They’re looking more human every day as growth races ahead.

The head has straightened a little to make room for the rapidly developing brain. Eyelids are forming to cover the eyes, and tiny retinas are developing their first hint of colour.

A petite mouth and tongue are taking shape, with early taste buds appearing. The nose tip is more defined, and the ears continue to form on the sides of the head.

Arms and legs are lengthening. Hands and feet look like small paddles with grooves where fingers and toes will soon separate. Cartilage is forming that will later harden into bone.

Inside, all the major organs such as the heart, brain, lungs, kidneys and gut are underway. The heart is growing larger and working hard, sending blood through a fine network of vessels.

Minuscule muscles are beginning to form. Although you can’t feel it yet, spontaneous movements are starting as your baby tries out those new muscles.

External genitals are starting to develop, though it will be many weeks before a scan can reveal the baby’s sex.

🌸Your body this week

Pregnancy hormones are in full swing at nine weeks. Levels of hCG have climbed to their peak, with oestrogen and progesterone also high — all essential for supporting the pregnancy.

Your breasts may feel fuller and more tender, and your waist might be thickening. Bloating, queasiness and a super-sensitive sense of smell are common right now.

Fatigue can be strong as the placenta gears up to take over more of the workload. Short rests and gentle movement can help steady energy through the day.

Frequent trips to the loo often continue. Keep hydrated during the day and ease off fluids just before bed if night-time bathroom visits are disrupting sleep.

A thin, milky vaginal discharge (leukorrhoea) is normal and protective. If discharge changes smell or colour, or if there’s itching, pain or bleeding, contact a midwife or GP.

Emotions may feel like a rollercoaster, perfectly normal when hormones are high and sleep is disrupted. Be kind to your body and ask for support when you needs it.

💛Symptoms you might notice

Every pregnancy is different. These are common around week 9 — speak to your midwife if anything worries you.

Fatigue

Growing the placenta is hard work. Try earlier bedtimes, short daytime rests and light activity, such as a ten-minute walk, to lift energy and mood.

Nausea and Vomiting

Small, frequent snacks and sips of fluid can ease queasiness. Ginger, lemon and plain, dry foods are simple options that many find soothing.

Breast Tenderness and Growth

Soreness and fullness are common as blood flow increases. A soft, supportive bra or sleep bra can help with night-time discomfort.

Bloating, Gas and Constipation

Slower digestion can cause fullness and wind. Add fibre gradually, drink water and keep moving to support regularity.

Frequent Urination

Hormones and a growing uterus mean more bathroom trips. Don’t cut fluids, hydration supports your health and the pregnancy.

Headaches and Mood Swings

Hormonal shifts, tiredness and dehydration can trigger headaches or low mood. Rest, fluids and fresh air often help; seek medical advice if headaches are severe.

Heartburn and Indigestion

Eat slowly, avoid trigger foods (spicy, greasy or very acidic) and stay upright after meals. Speak to a pharmacist or midwife about pregnancy-safe remedies if needed.

Food Aversions or Cravings

Tastes can change from day to day. Aim for a balanced pattern overall, and speak to a healthcare professional if you crave non-food items.

Tips for week 9

Keep Up with Vitamins

Continue taking 400 micrograms of folic acid daily until at least week 12, plus 10 micrograms of vitamin D to support bones and muscles.

Snack Smart

If appetite is up and down, try little and often: boiled eggs with wholemeal soldiers, hummus with carrot sticks, or pitta with a sprinkle of cheese are simple, sustaining options.

Hydrate — and Time Fluids

Drink regularly through the day to support energy and digestion, then reduce in the hour or two before bed to limit night-time trips.

Book your Midwife Appointment

If not already arranged, schedule the booking appointment (usually between 8 and 12 weeks) to discuss screening choices and your care plan.

Gentle Exercise

Work towards 150 minutes of moderate activity a week if comfortable. Even short brisk walks count and can ease constipation, stress and poor sleep.

Healthy Eating Without ‘Eating for Two’

Focus on colourful fruit and veg, whole grains and lean proteins. Balanced meals help steady blood sugar and may reduce nausea.

Look After your Emotional Wellbeing

Talk to a midwife, GP or someone trusted if you feels anxious or low. Mindfulness, fresh air and realistic rest can all help.

Avoid Smoking and Alcohol, Limit Caffeine

Seek support to stop smoking and avoid alcohol. Keep caffeinated drinks to a sensible minimum.

Consider Antenatal Classes

Ask about local or online sessions to learn about labour, birth and early days, and to connect with other parents-to-be.

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