Pregnancy Week by Week: Development and Care Guide
Choose your week below for development summaries and practical reminders. Every pregnancy has its own course; your maternity team's advice and your local care pathway come first.
Choose your pregnancy week
Weeks 4–40: approximate development, care reminders and linked sources.
Make your next appointment useful
Contact maternity services when you know you are pregnant. Bring your medicines and supplements list, questions and any relevant health history. Ask how to reach the team outside appointment hours.
- What is the next test or appointment for?
- When should I expect the result, and who will explain it?
- Which symptoms should make me call immediately?
Understand the purpose of each test
Screening estimates the chance of particular conditions; a reassuring result does not rule out everything. A higher-chance result needs an explanation and a discussion of further options. Testing schedules and available choices vary by country.
Early term is different from full term
A due date is an estimate. Being full term does not remove the need to report concerning symptoms.
| Term | Completed pregnancy weeks |
|---|---|
| Early term | 37 weeks 0 days through 38 weeks 6 days |
| Full term | 39 weeks 0 days through 40 weeks 6 days |
Food and supplement essentials
Review your prenatal product with your clinician or pharmacist. Nutrient intake targets and supplement doses are different; do not add several products without checking for duplicate ingredients. Folic acid is particularly important before pregnancy and early on.
- Choose varied foods and discuss restrictions or deficiencies with your care team.
- Avoid alcohol and raw fish, including previously frozen raw-fish sushi; use cooked alternatives.
- NHS guidance limits caffeine to 200 mg a day in total. Cup sizes and caffeine content vary.
NHS: pregnancy vitamins and supplements · NHS: food safety in pregnancy
Know your baby's usual movements
First movements are often felt at 16–24 weeks. Tell your midwife if you have not felt any by 24 weeks. If the usual pattern slows, stops or changes, contact maternity care immediately. Do not wait until tomorrow or use a home Doppler for reassurance.
Symptoms that need prompt care
Get urgent advice for any bleeding or spotting. Get immediate help for severe or persistent pain, trouble breathing, chest pain, fainting, a severe headache or vision changes. Call your local emergency service for collapse or severe bleeding. This list is not exhaustive; call when something feels wrong.
NHS: bleeding and spotting · CDC: urgent maternal warning signs
Common questions
Does a weekly size comparison show whether my baby is growing normally?
No. Weekly comparisons are illustrations. Your maternity team interprets your baby's measurements alongside pregnancy dates, scans and other findings.
Can I wait for my next appointment if I am worried?
Contact your maternity team when you are worried. Urgent symptoms and changes in the usual movement pattern need prompt assessment.
Sources
Checked 3 October 2026. These are editorial summaries of the linked guidance; no clinical review of this page is claimed.