Week-by-week pregnancy guide
Your interactive pregnancy timeline
Move through weeks 4–40 for a clear overview of fetal development, common maternal changes and discussion points for prenatal visits.
Use as a consultation companion
Pregnancies vary. Your clinician may recommend a different scan, test or visit schedule based on individual risk.
First trimester
Week 4
4132740
Changes you may notice
What to discuss
Seek urgent assessment
Heavy bleeding, severe abdominal pain, fainting, seizures, severe headache with visual symptoms, leaking fluid, regular painful contractions before term, or reduced fetal movement after movements are established should not wait for a routine appointment.
Continue learning