11 Weeks Pregnant: Baby, Body and What to Expect

Week 11 at a glance

At 11 weeks, the fetus is often about 4–5 cm (1.6–2 in) long, roughly the size of a Brussels sprout. The iris is forming, and nail beds are beginning to develop on the fingers and toes.

11 weeks pregnant is about 2.5 months. You are in month 3 of pregnancy and the first trimester.

Your baby at 11 weeks

The baby is about the size of a Brussels sprout

At 11 weeks, the baby is becoming much more recognizable. The iris is forming, and the nails are starting to develop.

What is happening this week

The fetus is often about 4–5 cm (1.6–2 in) long. This is a period of active growth. Facial features become clearer, and the organs continue maturing and settling into their roles.

The iris starts to form in the eyes. Eye color is determined later, as the iris continues to develop.
Nail plates begin developing on the fingers and toes.
The bones are continuing to harden, and the baby may move more, although movements are usually too small to feel yet.

Due dates are often estimated from the first day of your last period or from an early ultrasound, so the week count may differ slightly from other sources. Your provider can explain how your pregnancy is being dated.

How this week may feel

For many people, nausea begins to ease around this time, although fatigue, sensitivity to smells and changes in appetite may continue. If symptoms feel strong or are affecting your daily life, many providers recommend talking with your OB-GYN or midwife.

Get medical help right away if you have severe pain, heavy bleeding, fever, fainting, or sudden weakness. Call 911 or go to the nearest emergency room if you feel seriously unwell.

See week 11 in 3DNova shows how your baby grows each week and keeps a symptom log for your doctor. Try Nova

Your body at 11 weeks

Why You Feel Hot and Your Heart Beats Faster at 11 Weeks

At 11 weeks pregnant, your body is working hard to support your baby. One of the biggest changes is the increase in blood volume. Your blood volume starts rising early in pregnancy and keeps climbing for much of the pregnancy. By the end, you may have about 40-50% more blood than before.

Why does your body need so much more blood?

Blood carries oxygen and nutrients to the placenta and then to your baby. To handle this extra work, your heart needs to pump a larger volume of blood, which supports your baby's growth.

Why do you feel hot?

As blood volume increases, more blood flows near the surface of your skin, which can make you feel warm. Pregnancy hormones may also raise your body temperature and make you more sensitive to heat, even in cool rooms.

Is a faster heartbeat normal?

Your heart beats a bit faster and works a little harder to pump the extra blood. It is common to notice that your pulse is somewhat faster than usual.

Call your doctor, midwife, or go to urgent care right away if you have severe shortness of breath, chest pain, fainting, or a racing heartbeat that does not slow down when you rest. Call 911 if you have chest pain or trouble breathing that is severe or sudden.

How to help yourself

Drink enough water throughout the day to stay hydrated.
Wear layers so you can easily adjust your body temperature.
Rest when you feel tired, and take breaks as needed.

Common symptoms at 11 weeks

Feeling warm or hot

Rising blood volume and a faster metabolism can make you feel warmer than usual. Lighter layers, cool water, and a fan or open window can help you stay comfortable.

Racing or pounding heartbeat

Your heart pumps more blood to support your growing baby, so you may notice it beating faster, especially after walking or climbing stairs. Resting and slowing your pace can ease it, but tell your care team if you have chest pain, fainting, or a heartbeat that feels very fast or irregular.

Tiredness

Many people feel worn out in the first trimester as their body works hard to support the pregnancy. Short rests, earlier bedtimes, and small meals through the day can help you keep your energy steadier.

Nausea or queasiness

Some people still feel queasy at this stage, often at certain times of day. Eating small, plain snacks often and keeping crackers by the bed may help you feel more settled.

Breast tenderness

Your breasts may feel sore, full, or more sensitive as hormones change. A supportive bra, especially one worn at night, can make you feel more comfortable.

Frequent urination

You may need to pee more often as blood flow to your kidneys increases and your uterus grows. Drinking water through the day, and cutting back on caffeine, can help you stay comfortable.

Your week 11 checklist

Drink water regularly through the day and keep a bottle nearby. Choose light, breathable clothing and layers you can remove. Eat small, balanced snacks to help with nausea and energy dips. Write down any questions for your next prenatal visit. Rest when you can, and let others help with heavy tasks. Keep a list of any medicines or supplements you take and check with your care team before starting new ones.

Tests and appointments

First-trimester screening. Many people are offered screening between about 10 and 13 weeks, which can include a blood test and an ultrasound measuring the back of the baby's neck. Screening shows chances for certain conditions and is optional, so you can talk with your care team about what fits your wishes.

For your partner: Offer to cook easy meals, pick up groceries, and handle chores so your partner can rest. Let them know you may feel warm, tired, or queasy, and listen without rushing to fix it.

Questions about week 11

How many months is 11 weeks pregnant?

11 weeks pregnant is about 2.5 months. You are in month 3 of pregnancy and the first trimester.

What trimester is 11 weeks?

Week 11 is in the first trimester. The first trimester runs through week 13, the second from week 14 to 27 and the third from week 28 until birth.

What is happening with the baby at 11 weeks?

At 11 weeks, the fetus is often about 4–5 cm (1.6–2 in) long, roughly the size of a Brussels sprout. The iris is forming, and nail beds are beginning to develop on the fingers and toes.

Why does my heart race at 11 weeks?

Your blood volume is rising to support your baby, so your heart pumps more blood with each beat. This is common. Let your care team know about chest pain, dizziness, fainting, or a heartbeat that feels very fast or uneven.

Is it normal to feel hot all the time early in pregnancy?

Yes, many people feel warmer early on because of higher blood volume and hormone changes. Dressing in layers, staying hydrated, and keeping cool can help you feel more comfortable.

What should I eat when I feel queasy at 11 weeks?

Many people find small, plain, dry foods easier, such as crackers, toast, or fruit. Eating regularly and avoiding an empty stomach may help. Ask your care team if nausea makes it hard to eat or drink.