At 28 weeks, the fetus is often about 37–38 cm (14.6–15 in) long and weighs around 1,000 g (about 2.2 lb), roughly the size of a large eggplant. Sleep and wake cycles are developing, so periods of activity and quiet become more distinct.
28 weeks pregnant is about 6.5 months. You are in month 7 of pregnancy and the third trimester.
Your baby at 28 weeks
Your baby's sleep-wake cycles are developing
At 28 weeks, your baby is developing sleep-wake cycles. This is also the start of the third trimester.
What is happening this week
The fetus is often about 37–38 cm (14.6–15 in) long and weighs around 1,000 g (about 2.2 lb). Periods of activity and rest become more distinct, and the nervous system keeps maturing to support these sleep rhythms.
- Your baby may be very active and then quiet for longer stretches.
- Sleep and wake periods are becoming more regular.
- The brain, lungs, skin and muscles continue to develop.
How you may feel this week
By 28 weeks, your belly is usually clearly rounded, and movements may feel very noticeable. Heartburn, back pain, shortness of breath with activity and evening tiredness can still happen.
Your body at 28 weeks
Why breathing may feel harder
By 28 weeks, many pregnant people find that walking feels harder or that taking a deep breath doesn't feel as full. This is a common experience with a clear physical cause.
Why does it happen?
- Pressure on the diaphragm: Your uterus is growing and pushing upward, which limits how far your lungs can expand.
- Higher oxygen needs: Your body needs more oxygen to support your baby and your increased blood volume.
- Hormone changes: Higher progesterone levels may make you breathe a little faster or more deeply.
When to contact your provider
Breathlessness is often normal, but some symptoms need prompt medical care. If you have any of the following, call your provider right away or go to the emergency room. If you have severe trouble breathing, call 911.
- Sharp chest pain, especially when you take a breath.
- A bluish tint to your lips or fingernails.
- Shortness of breath while resting that does not go away.
- A persistent cough, wheezing, or coughing up blood.
- Racing or pounding heartbeat, or feeling faint or dizzy.
- New swelling in your face or hands, a severe headache, or vision changes.
Common symptoms at 28 weeks
Feeling winded, especially when climbing stairs or lying flat, is common as your growing uterus presses up on your diaphragm. Sitting upright, moving slowly, and taking breaks can make breathing feel easier.
Your stomach may feel tight or burny after meals because the growing baby pushes it upward. Smaller meals, staying upright after eating, and avoiding late-night snacks often help.
Sudden cramps in your calves, often at night, are common this time of year. Gently stretching your calves before bed and staying hydrated may ease them.
Some puffiness in your feet, ankles, or fingers is common by the late second trimester. Resting with your feet raised and wearing supportive shoes can help, and tell your provider about sudden or face-level swelling.
Finding a comfortable position may get harder as your belly grows. Many people find that lying on their side, with a pillow between the knees or under the belly, feels more comfortable.
Your baby has more distinct periods of activity and rest now. Noticing a usual pattern of movement is helpful, and your provider can tell you what to do if movement seems to change.
Your week 28 checklist
Tests and appointments
- Glucose screening. A blood sugar test, often a glucose challenge drink, is commonly offered between 24 and 28 weeks to check for gestational diabetes.
- Blood count (CBC). A routine blood test may be done to check for anemia, which can affect how much oxygen you get and can add to feeling short of breath.
- Rh factor follow-up. If you are Rh-negative, your provider may offer an injection around 28 weeks to protect your baby's blood type from future problems.
Questions about week 28
How many months is 28 weeks pregnant?
28 weeks pregnant is about 6.5 months. You are in month 7 of pregnancy and the third trimester.
What trimester is 28 weeks?
Week 28 is in the third 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 28 weeks?
At 28 weeks, the fetus is often about 37–38 cm (14.6–15 in) long and weighs around 1,000 g (about 2.2 lb), roughly the size of a large eggplant. Sleep and wake cycles are developing, so periods of activity and quiet become more distinct.
Is it normal to feel out of breath at 28 weeks?
Yes, it is common. Your growing uterus presses up on your diaphragm, and your body needs more oxygen. Slowing down and sitting upright can help. Call your provider if breathing is severe, comes with chest pain, or happens at rest.
How often should I count baby kicks at 28 weeks?
Many providers suggest counting movements at the same time each day and noticing your usual pattern. Ask your provider how they want you to track movement and when to call if you notice a clear change.
What is the glucose screening test like?
You usually drink a sweet liquid, then have blood drawn about an hour later to check your blood sugar. Some offices use a different schedule. Ask your provider what to expect and whether you need to fast beforehand.
Safe or not?
Guides for this stage
Learn more
- NIH: Pregnancy (NICHD)
- CDC: Pregnancy
Follow your pregnancy in Nova
Week-by-week growth, a symptom log and a report for your doctor.
Get it on the App StoreGeneral information only; it does not replace advice from your doctor or midwife.