Weeks 1–42
Follow the pregnancy journey in an order relevant to your estimated week.
Weekly pregnancy guide
Week-by-week pregnancy tracking and baby development
Every pregnancy week can bring new questions. The weekly guide presents general baby development, changes you may notice, and topics to discuss with your care professional in a clear, organized flow.
Week-by-week pregnancy
Weeks 1–42
Follow the pregnancy journey in an order relevant to your estimated week.
Baby development
Read development information in context, without rigid comparisons.
Source transparency
Open the official medical sources cited throughout the content.
Baby development
Read development information in context, without rigid comparisons.
Source transparency
Open the official medical sources cited throughout the content.
Source transparency
Supported by official medical sources
You can open and review every reference on this page.
What does a weekly pregnancy guide explain?
Each week brings together general information about fetal development, changes a pregnant person may experience, and subjects that may come up in routine prenatal care. It is designed to give you a clearer framework for conversations with your care team.
Growth rates and symptoms vary. Example sizes, comparisons, or symptom lists in weekly content are not stand-alone measures of healthy development.
Follow baby development without comparison pressure
Week-by-week content emphasizes that development occurs across ranges and can differ between pregnancies. Ultrasound findings and test results need to be interpreted together by the professionals responsible for your care.
Combine weekly reading with your own records
Alongside the weekly guide, you can keep dated records for weight, blood pressure, glucose, movement, or contractions. Use them as a personal journal for appointments, not as a diagnostic result.
Medical information boundary
Weekly information describes general development and does not replace an examination, ultrasound, test result interpretation, or advice from your clinician.
Common questions
Frequently asked questions
When does week-by-week pregnancy tracking start?
Clinical pregnancy age is commonly counted from the first day of the last menstrual period. The app's weekly flow uses the date entered as the starting point for that estimate.
Does every baby develop identically in the same week?
No. Development and measurements vary. Weekly content offers general information, while individual development is assessed by your healthcare professional.
Can weekly content replace prenatal appointments?
No. It is general educational material intended to support informed conversations, not personal medical advice or diagnosis.
Source transparency
Medical references
This content refers to current guidance from the following official health organizations and relevant specialist content.
Complete your tracking
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Turn this week into an organized tracking flow
Explore clearly sourced weekly pregnancy content and personal tracking tools in the app.