Baby by Week
By Muhammed Shuweck · Updated 11 August 2026
Week 11

Your week 11 guide

Your baby is growing quickly and becoming much more active, even though the movements are still far too small and cushioned for you to feel. The body is starting to catch up with the head in proportion. Allahumma barik, may there be kindness around you on the days you feel stretched.
Trimester

1

Month

3

Weeks left

29

Size at a glance

Comparison
Fig
Length
3.8–5.1 cm
Weight
0.25 oz
Measurements are approximate. Healthy babies grow at different rates.

Baby development

Connections between brain cells are forming at a remarkable pace. Nerve cells are not simply multiplying; they are wiring themselves into circuits, and it is the circuits rather than the cell count that eventually make movement, sensation and thought possible. Almost all of this wiring is still provisional and will be reshaped many times before birth.
The ears are migrating from the neck toward their final position on the sides of the head, and the face is becoming better proportioned. The eyes, which began far apart on the sides, are moving toward the front. These shifts are why a scan photograph from this stage looks so different from one taken a month later.
The liver is producing red blood cells while the external genitals continue to develop. The liver takes over blood cell production from the yolk sac at this stage and holds that job until the bone marrow is ready much later in pregnancy. The genitals are forming from the same starting tissue in all babies and are not yet reliably distinguishable on a scan.

Your body

Morning sickness may start to ease, though bloating and wind can continue. For many women the worst of the nausea lifts somewhere between eleven and fourteen weeks as hCG levels begin to fall. If yours does not lift, that is not unusual and it is not something you simply have to accept; ask about treatment.
Frequent urination continues as blood flow through your kidneys increases substantially. Your kidneys are filtering considerably more blood than before pregnancy, which straightforwardly produces more urine. Do not cut back on drinking to manage it, and mention any burning, pain or fever, because urinary infections are more common in pregnancy and need treating.
Your breasts may feel larger and more sensitive, and a small bump may be visible. Milk ducts are developing and blood flow to the breast tissue has increased, which accounts for both the size and the sensitivity. If you are showing early, expect comments; you owe nobody an explanation about your body's timeline.

This week's checklist

Go over upcoming tests and appointments with your clinician so you know what is coming and when. Knowing which weeks matter helps you plan work and travel around them rather than discovering a clash at short notice. Ask what each appointment involves, since some are quick checks and others take an hour.
Start a registry or planning list only if it genuinely helps you. Some women find early planning calming and others find it premature and stressful, and there is no advantage in doing it now beyond your own peace of mind. Nothing bought at eleven weeks will be needed for many months.
Choose comfortable clothing and build actual rest into your week. The first trimester is physically demanding in a way that is invisible to everyone around you, and the tiredness is a genuine physiological effect rather than a lack of resolve. Treating rest as a fixed commitment works better than hoping for a gap. Alhamdulillah for a quiet place to put your feet up, whenever you find one.
Keep track of caffeine: Caffeine is in far more than coffee. Tea, cola, chocolate, energy drinks and some medicines and supplements all add to your daily total.
Many maternity authorities, including those in the UK and the United States, advise keeping caffeine at or below 200 mg per day in pregnancy. Check the guidance where you live, and count every source rather than only the cups of coffee.

Call your care team

Report any bleeding during pregnancy, however light.
Seek urgent help for heavy bleeding, severe abdominal pain, shoulder-tip pain, fainting, dehydration, or fever.

Medical information, not medical advice

Every pregnancy is different. Use this guide for general education and follow the advice of your own maternity care team. Do not delay urgent care because of something you read here.