Week 27 of Pregnancy

Pregnancy Week 27 marks the final week of the second trimester, as your baby's brain continues rapid development. Healthcare providers calculate pregnancy from the first day of your last menstrual period, and by week 27 your baby is often compared to the size of a cauliflower or a head of romaine lettuce.

Understanding week 27 of pregnancy can help you know what is happening in your body as you prepare to enter the third trimester.

What Happens During Week 27 of Pregnancy?

During week 27, your baby's brain tissue continues increasing rapidly, sleep-wake cycles continue developing, and the retina layers of the eyes continue forming.

As your baby continues gaining weight and strength, movements often become more noticeable and coordinated this week.

What Are the Symptoms of Pregnancy in Week 27?

Pregnancy symptoms in week 27 often reflect a growing bump and the approach of the third trimester.

• Braxton Hicks Contractions

Mild, irregular tightening of the uterus can continue to occur occasionally during this stage.

• Leg Cramps

Occasional leg cramps, particularly at night, can continue during this stage.

• Backache

As your bump continues to grow, mild back discomfort can persist.

• Shortness of Breath

As the uterus grows and puts pressure on the diaphragm, mild shortness of breath can begin.

• Trouble Sleeping

A growing bump and increased baby movement can continue to make comfortable sleep more difficult.

Baby Development in Week 27

• Brain Tissue Increases

Your baby's brain tissue continues developing rapidly, supporting increasingly complex activity.

• Sleep-Wake Cycles Develop

Your baby continues developing more distinct patterns of sleeping and waking.

• Retina Layers Continue Forming

The layers of your baby's retina continue developing, an important step for vision after birth.

How Does Your Body Change During Week 27?

Week 27 is mainly characterised by continued uterine growth as you approach the third trimester.

• Uterus Continues Rising

Your uterus continues growing steadily above the level of your belly button.

• Weight Gain Continues

Steady, healthy weight gain often continues as your baby grows.

• Colostrum May Begin Leaking

Some people notice small amounts of colostrum, an early form of breast milk, beginning to leak.

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What Should You Eat During Week 27 of Pregnancy?

A nutrient-dense diet remains important in week 27, especially as your baby's brain continues rapid development.

• Choose Iron-Rich Foods

Iron supports your rising blood volume and helps prevent fatigue. Good sources include lean meat, beans, chickpeas, lentils and spinach.

• Include Protein in Your Diet

Protein supports your baby's rapidly developing organs and tissues. Eggs, fish, chicken, paneer, tofu, beans and lentils are useful sources.

• Choose Omega-3 Rich Foods

Foods such as walnuts, flaxseeds and low-mercury fish can support your baby's developing brain.

• Choose Fibre-Rich Foods

Fibre from fruits, vegetables and whole grains can help support digestion.

• Stay Hydrated

Adequate water intake can help ease leg cramps and support increasing blood volume.

What Foods and Substances Should You Avoid?

As your baby's brain and organs continue rapid development, avoiding certain substances and foods remains an important part of a healthy pregnancy.

• Alcohol and Tobacco

Avoid alcohol and smoking completely, as they can affect your baby's developing brain and organs.

• Excessive Caffeine

Keep caffeine intake within the limits recommended by your healthcare provider.

• Raw or Undercooked Foods

Choose properly cooked foods and follow good food-safety practices, avoiding raw or undercooked meat, eggs, unpasteurised dairy and high-mercury fish.

• Highly Processed Foods

Limit foods high in added sugars, excess salt and unhealthy fats, and focus instead on a varied, nutrient-rich diet.

Exercise During Week 27 of Pregnancy

Gentle movement can help ease backaches and support circulation, though it is important to listen to your body and rest when needed.

Choose activities that are comfortable for your fitness level, and avoid suddenly starting strenuous exercise without appropriate guidance.

• Walking and Gentle Exercise

Walking is a simple, low-impact way to stay active and can help support circulation and reduce swelling.

• Stretching and Yoga

Gentle stretching and suitable prenatal yoga practices can support flexibility, relaxation and help ease leg cramps.

How Can You Prepare for a Healthy Pregnancy?

Week 27 is a good time to prepare for the third trimester and continue building healthy habits.

• Learn About Rh Testing - If you are Rh negative, your provider may discuss an anti-D injection typically given around this time.

• Continue Prenatal Vitamins - Keep taking a prenatal vitamin with folic acid as recommended by your doctor.

• Prepare for More Frequent Visits - Prenatal appointments often become more frequent starting in the third trimester.

• Get Adequate Rest - Continue prioritising sleep and rest as your body adjusts to a growing bump.

• Manage Stress - Practice relaxation techniques such as meditation, gentle yoga or deep breathing.

What Tests and Checkups Are Useful During Week 27?

Your healthcare provider may recommend a combination of tests around this stage to confirm your baby's development and monitor your health.

• Rh Antibody Screening

If you are Rh negative, this test and a follow-up injection may be recommended around this time.

• Routine Prenatal Check-Up

Regular check-ups continue to monitor your health and your baby's growth.

• Blood Pressure and Urine Checks

Routine monitoring continues to track your overall health as you approach the third trimester.

Week 27 Pregnancy Care Tips

A few simple habits can help you manage symptoms and support your baby's development this week:

• Continue taking prenatal vitamins with folic acid.

• Eat balanced, nutritious meals to support your growing baby.

• Stay well hydrated throughout the day.

• Get plenty of rest.

• Avoid alcohol, smoking and unapproved medications.

• Ask your provider about Rh testing if relevant.

• Manage stress with relaxation techniques.

• Avoid self-medicating without consulting your doctor.

When Should You Consult a Doctor?

Some symptoms should not be dismissed without medical evaluation. Speak with a healthcare provider if you experience heavy vaginal bleeding, severe abdominal pain, high fever, severe dizziness or fainting, severe vomiting, or unusual vaginal discharge.

If you have an existing health condition or take regular medication, discussing your health with a healthcare provider early in pregnancy is recommended.

Frequently Asked Questions About Pregnancy Week 27

• How big is my baby at week 27?

Your baby is typically about the size of a cauliflower or head of romaine lettuce at week 27, with rapidly developing brain tissue.

• Is week 27 the end of the second trimester?

Yes. Week 27 is generally considered the final week of the second trimester, with the third trimester beginning around week 28.

• Why am I short of breath at week 27?

As the uterus grows and puts pressure on the diaphragm, mild shortness of breath can begin during this stage.

• What should I eat during Week 27?

Focus on iron, protein and omega-3 rich foods to support your baby's rapidly developing brain.

• Can I exercise during Week 27?

If you are healthy and have no medical restrictions, gentle activities such as walking and prenatal yoga can support overall fitness during this stage.

• When should I see a doctor during Week 27?

Seek medical advice for heavy vaginal bleeding, severe abdominal pain, high fever, severe dizziness or fainting, severe vomiting, or other unusual or concerning symptoms.