How to use this guide
Pregnancy dating usually starts from the first day of your last period, which is why “week 1” can exist before conception. Open your current week for a short, readable snapshot: baby development in plain language, common parent experiences, and practical tracking ideas.
Sizes listed on each page are approximate averages used for orientation — genetics, ultrasound dating, and your clinician’s measurements always come first. If your due date changes after a scan, update it in Preglo so your week view stays aligned with care.
First, second, and third trimester at a glance
- Weeks 1–12: foundations form; fatigue and nausea are common; prenatal care begins.
- Weeks 13–27: energy often steadies; anatomy scans arrive; flutters become kicks.
- Weeks 28–40: growth accelerates; kick awareness matters; birth planning gets real.
Track the week in Preglo
Reading helps. Logging makes patterns visible. Preglo keeps your week, symptoms, water, kick sessions, and notes private on iPhone — with optional iCloud backup if you want it.
This content is for personal wellness tracking only and does not replace medical advice from your doctor or midwife.