Trimester 1 · Pregnancy

Week 10 of pregnancy

Your baby is now about the length of a baby nail file, roughly thirty millimetres from crown to rump and entering the final stretch of the first trimester.

About the size of
Baby Nail File
Length
30 mm
Weight
Around 4 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 baby nail file, roughly thirty millimetres from crown to rump and entering the final stretch of the first trimester.

This week marks the early fetal period in earnest. Bones and cartilage are forming, tiny elbows can already bend, and the first outlines of knees and ankles are appearing.

The head is still relatively large, but the face is becoming more proportionate. Eyelids are thin and partly closed, the nose has two little nostrils, and a delicate upper lip is in place.

Inside your baby’s gums, tooth buds are developing that will later become the first milk teeth. The jaw is shaping up, ready to house those future smiles.

The stomach is beginning to produce digestive juices and the kidneys are making small amounts of urine, early signs that these organs are switching on.

The heart is beating very fast, often around three times your own rate, driving blood through a rapidly branching network of vessels.

Small, jerky movements are common now. While you won’t feel them yet, these wriggles can sometimes be seen on an ultrasound scan.

🌸Your body this week

Nearly at the end of the first trimester, you might notice jeans feeling snug. The uterus is about the size of a large orange, and bloating can add to that tight waistband feeling.

Progesterone relaxes the womb muscles so it can expand, but it also slows digestion. This can lead to burping, wind, indigestion and heartburn.

Tiredness and nausea may still linger, though many people notice a boost in energy as the second trimester approaches.

Headaches or light-headed spells can occur in early pregnancy. Rest, regular snacks and fluids often help, speak to a midwife or GP if symptoms are severe.

A thin, milky vaginal discharge (leukorrhoea) is normal and protective. Seek advice if there’s bleeding, pain, itching or an unusual odour.

You may notice more visible veins on the breasts or abdomen as blood volume rises to support your baby’s growth.

💛Symptoms you might notice

Every pregnancy is different. These are common around week 10 — speak to your midwife if anything worries you.

Bloating and Gas

Slower digestion can leave you feeling full or windy. Eat slowly, sip fluids and try smaller, more frequent meals to stay comfortable.

Indigestion and Heartburn

Avoid rich, spicy or very fatty foods, and try not to eat late at night. Staying upright after meals and propping the head of the bed can reduce reflux.

Nausea

If queasiness persists, plain snacks (crackers, toast, yogurt, fruit) and sips of water or ginger tea can help. Speak to a healthcare professional if you can’t keep fluids down.

Fatigue

Growing a placenta is hard work. Build in early nights, short rests and gentle movement, even a ten-minute walk can lift energy and mood.

Headaches

Hormones, tiredness and dehydration can play a part. Rest in a dark room, use a cool compress and keep hydrated. Check with a midwife or GP before taking any medicines.

Dizziness

Stand up slowly, snack regularly and drink water throughout the day. Sit or lie down if you feels faint and mention frequent episodes to a healthcare professional.

Round Ligament Pain

As the womb grows, brief, sharp twinges on one or both sides of the lower belly can occur when moving or turning. Resting and changing position usually settles it.

Skin and Hair Changes

Some people notice oilier skin or breakouts, dark patches on the face (chloasma), and thicker hair, all common, hormone-driven changes.

Increased Vaginal Discharge

Leukorrhoea helps protect the birth canal. Choose breathable underwear and avoid douching, which can upset the natural balance.

Tips for week 10

Attend your Booking Appointment

If scheduled this week, bring any medical history and questions. Screening options, scan timings and your care plan can all be discussed.

Tame the Bloat with Small, Regular Meals

Aim for six light meals or snacks daily. Eat slowly, avoid eating late at night, and try a short stroll after meals to support digestion.

Supportive Nutrition — Not ‘Eating for Two’

Focus on colourful fruit and vegetables, whole grains, lean proteins, and dairy or fortified alternatives. Balance helps steady blood sugar and ease nausea.

Keep Taking Folic Acid and Vitamin D

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

Move Gently, Often

Work towards 150 minutes of moderate activity a week if comfortable. Even brief, brisk walks count and can help with sleep, stress and constipation.

Time Fluids Wisely

Drink water regularly through the day, then ease off close to bedtime if night-time bathroom trips are disturbing sleep.

Avoid Smoking and Alcohol, Limit Caffeine

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

Look After your Emotional Wellbeing

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

Consider Antenatal Classes

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

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