Evidence-informed content. Review status is maintained by the editorial team.
Week 28 sits within the third trimester. The third trimester begins, with rapid brain growth and increasing fat stores. This guide explains what may be happening now, what can vary, and which concerns deserve prompt professional advice.
What is happening at pregnancy week 28
The uterus is larger, and heartburn, tiredness and pressure symptoms may intensify. Gestational age is counted from the first day of the last menstrual period, so early numbered weeks include time before conception. Dating may later be adjusted using clinical information and ultrasound.
Baby development
The brain develops grooves and connections, the eyes can open, and the lungs remain immature but continue producing surfactant.
Approximate size and growth
The fetus is around aubergine sized, about 37 centimetres head to heel.
Changes you may notice
Movement is usually regular enough to recognise an individual pattern. Some people notice several changes at once, while others feel little different. The presence or absence of a symptom cannot on its own confirm how a pregnancy is progressing.
Common symptoms
- Strong kicks and rolls
- Heartburn or constipation
- Backache and tiredness
These experiences are possibilities, not a checklist. Symptoms can be mild, strong, intermittent or absent at week 28, and a different pattern does not automatically mean that anything is wrong.
Emotional wellbeing
Attention may shift toward labour and safety. Reliable education can replace frightening stories with practical choices. A short daily check-in can help: notice what feels manageable, identify one source of support, and write down a concern instead of carrying it alone.
If worry is persistent, interferes with sleep or daily life, or makes it hard to cope, tell your midwife, doctor or another trusted healthcare professional. Emotional health deserves the same attention as physical health.
Nutrition and hydration
Smaller balanced meals can help reflux while maintaining energy; ask about treatment if symptoms persist. Sip fluids regularly and use urine colour and thirst as everyday prompts, while following any fluid advice given for a medical condition.
Aim for regular meals built around vegetables and fruit, wholegrain or other fibre-rich foods, protein foods and suitable dairy or alternatives. Follow local advice on prenatal supplements and foods to avoid; individual needs differ, especially with allergies, diabetes, anaemia or severe nausea.
Safe movement and daily comfort
Prioritise stability, pelvic comfort and rest; avoid overheating and high-fall-risk activity. Choose an intensity at which you can still speak comfortably, include rest, and adapt for heat, balance changes or pelvic discomfort.
For an uncomplicated pregnancy, comfortable everyday activity is often encouraged. Stop and seek advice if movement causes pain, bleeding, dizziness, chest symptoms, fluid loss or contractions. A clinician can tailor advice for complications or a previously inactive routine.
Appointments and screening
Care may now become more frequent. Blood tests, blood-group-related treatment, vaccines or growth checks may be due depending on location and history.
Exact schedules and tests vary by country, pregnancy history and care plan. Keep a note of new symptoms, medicines and questions so your appointment can focus on what matters to you.
Warning signs and when to seek care
Trust a strong sense that something is wrong: maternity services would rather assess a concern than have you delay because it does not match a list.
- Contact your maternity service promptly for vaginal bleeding, suspected fluid loss, severe or persistent abdominal pain, a severe headache, vision changes, sudden swelling, fever, breathing difficulty, chest pain or feeling acutely unwell.
- Once you have established a usual pattern of movement, seek maternity advice promptly if your baby is moving less than usual or the pattern changes. Do not wait for the next day.
- Use emergency services for collapse, severe breathing difficulty, heavy bleeding, a seizure or another immediately life-threatening concern.
Practical preparation for this week
Learn how your maternity unit wants you to respond to reduced movement, contractions or fluid loss.
- Save triage numbers in your phone
- Discuss vaccine timing
- Begin a hospital or birth-centre logistics plan
Frequently asked questions
Do movements become less important when space is tight?
No. The type may change from sharp kicks to rolls, but a baby should continue moving in its usual pattern.
Are all babies head-down now?
No. Position can change frequently at 28 weeks and is not usually final.
Should I compare my pregnancy with someone else at week 28?
No two pregnancies follow an identical pattern. Dating can vary, symptoms are influenced by many factors, and growth is assessed over time rather than from a single comparison. Bring personal concerns to your maternity team.
Week 28 in brief
Week 28 starts the third trimester. Movement awareness, scheduled tests and practical triage planning become especially important.
References
The following authoritative resources support editorial and professional review. Guidance should be checked for currency and local applicability before publication.
OUR REVIEW PROMISE
Evidence-based, clearly reviewed.
Healthier Baby Today articles are reviewed for accuracy and updated as guidance changes.
Last updated: July 17, 2026
