Trimester 1 · Pregnancy

Week 6 of pregnancy

Your baby is now about the size of a cotton bud tip, measuring around six millimetres from head to bottom. Though still tiny, this stage marks an incredible burst of growth as your baby’s head, body and first facial features begin to form.

About the size of
Cotton Bud Tip
Length
6 mm
Weight
Less than 1 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 size of a cotton bud tip, measuring around six millimetres from head to bottom. Though still tiny, this stage marks an incredible burst of growth as your baby’s head, body and first facial features begin to form.

Within that small shape, vital organs such as the heart, brain, liver and lungs are starting to take shape. The heart is already beginning to beat, pumping early blood through delicate new vessels that will soon connect to the umbilical cord.

Tiny limb buds are emerging, the first outlines of arms and legs, while small indentations are appearing where the ears and eyes will develop. These details will evolve quickly over the coming weeks into the unmistakable features of your baby’s face.

At this point, your baby still has a little tail-like extension, a normal part of early growth that will disappear as the spine lengthens. The skin is almost transparent, allowing the organs underneath to continue developing in perfect synchrony.

It’s astonishing to think that within only a few weeks, your baby has transformed from a cluster of cells into a miniature being with a beating heart and the beginnings of every major body system.

Even though you cannot yet feel movement, a lot is happening. These earliest stages lay the foundations for everything that follows, a tiny miracle unfolding one heartbeat at a time.

🌸Your body this week

Hormonal changes are now well underway, supporting the pregnancy and helping your baby to grow. Many people start to notice tender breasts, nausea, bloating or tiredness around this time, all normal signs that your body is adjusting.

Morning sickness can strike at any time of day and can range from mild queasiness to frequent vomiting. Small, regular meals, keeping hydrated and getting enough rest often help. Ginger tea, biscuits or acupressure wristbands can also bring some relief.

Frequent trips to the toilet are common as hormones increase blood flow to the pelvic area and the uterus begins to expand. Leaning forward when urinating can help empty the bladder fully, but you should continue to drink plenty of fluids.

Some people notice a metallic taste in the mouth, a heightened sense of smell, new food aversions or cravings, and occasional headaches. Emotional ups and downs can also occur as hormones fluctuate.

A thin, white vaginal discharge known as leukorrhoea is normal, helping to protect against infection. However, if you experiences itching, burning or bleeding, it’s important to contact a healthcare provider.

Although fatigue can be overwhelming, gentle daily movement, like a short walk, can improve sleep and mood. Listen to your body and rest whenever needed.

💛Symptoms you might notice

Every pregnancy is different. These are common around week 6 — speak to your midwife if anything worries you.

Nausea and Vomiting

One of the most common early symptoms, nausea often appears around week six and may occur at any time of day. Eating small, light meals, sipping water regularly and avoiding strong odours can make a big difference.

Fatigue

Building your baby’s vital organs is hard work. Hormones and increased energy demands can leave you feeling drained. Rest whenever possible and consider short naps or gentle exercise to boost energy.

Frequent Urination

As the uterus starts to expand and hormones increase circulation to the kidneys, you may find you needs to pee more often. This is normal and usually eases later in pregnancy as the uterus rises higher into the abdomen.

Bloating and Gas

The hormone progesterone relaxes the muscles of the digestive system, slowing digestion and sometimes causing bloating or trapped wind. Eating fibre-rich foods and staying well hydrated can help ease discomfort.

Breast Tenderness

Hormonal changes are preparing your breasts for breastfeeding. They may feel swollen, sore or heavy, and the skin around the nipples may darken as part of this natural preparation.

Mood Swings

Hormonal fluctuations, fatigue and the emotional reality of pregnancy can lead to mood changes. It’s normal to feel excited one moment and tearful the next, gentle reassurance and rest can help smooth the ups and downs.

Mild Cramping or Spotting

Light cramping can occur as the uterus stretches. Spotting is common but should always be mentioned to a midwife or doctor, especially if it becomes heavier or is accompanied by pain.

Tips for week 6

Book your First Midwife Appointment

Now is the time to contact your GP or local maternity service to arrange a booking appointment, usually held between 8 and 12 weeks. This is an opportunity to discuss your health, care options and early screening tests.

Take Folic Acid and Vitamin D

Continue taking 400 micrograms of folic acid daily until at least week 12 to help support your baby’s neural development. A 10-microgram vitamin D supplement also helps maintain healthy bones and muscles.

Eat Little and Often

If nausea makes meals difficult, try eating six small snacks a day instead of three large ones. Dry toast, fruit or plain crackers can help keep energy levels steady and settle the stomach.

Stay Active Safely

Aim for gentle daily exercise such as a short walk or prenatal yoga. Movement supports circulation, digestion and mental wellbeing, but you should rest whenever you feels tired.

Avoid Smoking, Alcohol and Limit Caffeine

If you smokes or drinks alcohol, now is the best time to stop. Limit tea, coffee and energy drinks. Midwives, GPs and local services can offer help and support without judgement.

Look After your Emotional Wellbeing

Feeling anxious or low in early pregnancy is common. Talk to your midwife, GP, partner or a trusted friend. Asking for help early ensures you gets the right support and reassurance.

Check Existing Medications

If you takes regular medication or has a long-term health condition, inform your GP or specialist right away. Never stop prescribed medication without professional advice.

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