This assistant gives general, educational information. It does not replace care from your doctor, midwife or obstetrician, who know your medical history. Ask them for advice about your own pregnancy.
Week by week
What's happening with you and your baby each week
Your pregnancy, week by week
Our Baby Journey is a free pregnancy guide with an AI assistant. Pick your week to see how big your baby is, how your baby is developing, what is changing in your body, and practical tips for that week. Then ask the assistant anything about your pregnancy, from symptoms and nutrition to scans and preparing for birth.
First trimester (weeks 1–13)
Second trimester (weeks 14–27)
- Week 14
- Week 15
- Week 16
- Week 17
- Week 18
- Week 19
- Week 20
- Week 21
- Week 22
- Week 23
- Week 24
- Week 25
- Week 26
- Week 27
Third trimester (weeks 28–40)
- Week 28
- Week 29
- Week 30
- Week 31
- Week 32
- Week 33
- Week 34
- Week 35
- Week 36
- Week 37
- Week 38
- Week 39
- Week 40
Frequently asked questions
How are pregnancy weeks counted?
Pregnancy is counted from the first day of your last menstrual period, not from conception. That is why you are already considered “2 weeks pregnant” around the time you ovulate, and why a full-term pregnancy is about 40 weeks.
Which weeks are in each trimester?
The first trimester runs from week 1 to week 13, the second trimester from week 14 to week 27, and the third trimester from week 28 until birth, usually around week 40.
Can the AI assistant replace my doctor or midwife?
No. The assistant gives general, educational information to help you understand your pregnancy and prepare questions for your appointments. It cannot examine you or know your medical history. Always follow the advice of your healthcare provider, and seek urgent care for heavy bleeding, severe pain, severe headache, vision changes, fever, fluid leaking, or reduced baby movements.
Is Our Baby Journey free?
Yes. The week-by-week guide and the AI assistant are free to use, with no account needed.