10 weeks pregnant: baby, body and what to expect

Trimester 1 of 3About 2.5 months30 weeks to go

Week 10 of pregnancy: baby is about the size of a kumquat

Week 10 at a glance

At 10 weeks, the baby is about 30 to 40 mm (1.2 to 1.6 inches) long and weighs around 4 grams (0.14 ounces), roughly the size of a kumquat. The main body structures are in place, and the baby is now called a fetus.

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

Your baby at 10 weeks

Your Baby Is Now a Fetus

This is an important milestone. Development shifts from building the main body structures to growth and maturation.

Why the name changes

The embryonic stage is when the main body structures form. From this point on, medical providers use the word fetus. The organs are in place, and they will keep growing, becoming more complex, and working together in more coordinated ways.

Fingers and toes begin to separate.
Nail beds and early tooth buds begin to form.
The kidneys start making urine, which becomes part of the amniotic fluid.

Size comparisons in apps are approximate. Actual measurements depend on exact dating, ultrasound technique, and individual growth.

How you may feel

For some people, nausea starts to ease over the next few weeks. For others, it lasts longer. Many providers recommend checking with your OB-GYN or midwife before starting any new medicine, vitamin, or supplement.

Call your provider right away if you have heavy bleeding, severe pain, a high fever, vomiting that keeps you from keeping down food or fluids, or signs of dehydration, such as dizziness or very little urine.

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Your body at 10 weeks

Why They Happen and How to Ease Discomfort

What Happens to Your Breasts at 10 Weeks

By 10 weeks of pregnancy, many people notice their breasts feel fuller, heavier, and more tender. These changes are a normal part of how the body prepares for breastfeeding.

The Main Causes of Change

The main cause is rising hormones, especially estrogen and progesterone. They stimulate breast tissue growth, increase blood flow to the breasts, and prepare the milk ducts for future milk production.

Size changes: breasts may grow because of new glandular and fatty tissue.
Sensitivity: the areolas (the darker area around the nipple) may darken, and the breasts may feel tender or sensitive.
Visible veins: increased blood flow can make the veins on your chest easier to see.

How to Ease Discomfort

Many people find that good support helps reduce breast soreness.

Choose comfortable bras: many people find soft, supportive bras with wide straps and no underwire work well.
Get fitted: your bra size may change during pregnancy, so a fitting can help you find better support.

Call your OB-GYN or midwife if you notice severe or one-sided breast pain, unusual nipple discharge, or redness or warmth in the breast skin. These signs need to be checked to rule out infection or other conditions.

Common symptoms at 10 weeks

Breast tenderness and fullness

Your breasts may feel sore, heavy, or sensitive as hormones prepare them for possible breastfeeding. A supportive, well-fitting bra and gentle washing can help, and this often eases as the first trimester goes on.

Fatigue

Many people feel very tired this week because the body is working hard to support early growth. Short rests, earlier bedtimes, and lighter schedules when you can manage them may help.

Nausea

Morning sickness can continue or start around now, and it can happen at any time of day. Eating small, frequent meals and keeping crackers by the bed are common ways people ease it.

Frequent urination

You may need to pee more often as blood volume rises and your kidneys work harder. Drinking water steadily through the day, and cutting back on caffeine late in the day, can make trips to the bathroom more manageable.

Bloating and constipation

Hormone changes can slow digestion, which may cause gas, bloating, or constipation. Fiber, fluids, and daily movement such as a short walk often help.

Your week 10 checklist

Schedule or confirm your first prenatal visit if you have not done so yet. Start or keep taking a prenatal vitamin with folic acid, as your care team advises. Write down any questions about symptoms, medicines, or foods to bring to your next appointment. Choose a bra that fits well and feels comfortable for sleep and daily wear. Drink water regularly and keep healthy snacks handy for nausea or low energy. Make a plan for rest during the workday, even if it is just a few quiet minutes.

Tests and appointments

First-trimester screening. This usually includes a blood test and an ultrasound measuring the back of the baby's neck, often offered between 11 and 14 weeks, so it may be scheduled soon.

For your partner: You can help by taking on extra household tasks, like cooking, cleaning, or running errands, when your partner feels tired or queasy. Sharing the bodily changes and asking how they feel each day can also make them feel supported.

Questions about week 10

How many months is 10 weeks pregnant?

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

What trimester is 10 weeks?

Week 10 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 10 weeks?

At 10 weeks, the baby is about 30 to 40 mm (1.2 to 1.6 inches) long and weighs around 4 grams (0.14 ounces), roughly the size of a kumquat. The main body structures are in place, and the baby is now called a fetus.

Is it normal to feel tired at 10 weeks?

Yes, fatigue is very common in early pregnancy. Hormone changes and the body's extra work can drain energy. Resting when you can, eating regular meals, and staying hydrated may help. If tiredness feels severe or you are worried, talk with your care team.

Can I still have nausea at 10 weeks?

Yes, nausea can continue for some people this week. Eating small amounts often, avoiding strong smells, and trying bland foods may help. If you cannot keep fluids down or lose weight, contact your care provider right away.

Why do my breasts look more veiny?

Increased blood flow and hormone changes can make the veins on your breasts look darker or more visible. This is common and usually harmless. Wearing a supportive bra can add comfort.

Safe or not?

LimitCan I drink green tea while pregnant?Generally OKCan I eat pineapple while pregnant?Ask your doctorCan I paint while pregnant?Generally OKCan you eat mayonnaise when pregnant?

Guides for this stage

LifestyleAir Travel in the First Trimester: What to Know Before You Fly Mental healthWorrying About Your Baby's Health in Early Pregnancy: Coping and Finding Calm HealthBasal Body Temperature: How to Track It and What It Can Tell You FeedingCommon Breastfeeding Myths and What Is Normal

Coming up next weekWeek 11: The baby is about the size of a Brussels sproutRead week 11 →

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Learn more

NIH: Pregnancy (NICHD)
CDC: Pregnancy

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General information only; it does not replace advice from your doctor or midwife.