Pregnancy Month by Month Guide

Select a month to see what's happening with your baby, your body, upcoming checkups, and nutrition priorities — all in one place.

Select month

🌱

Month 1: The Beginning

Weeks 1–4

First Trimester

👶 Baby's development

A fertilized egg implants in your uterus. The neural tube (brain & spine), heart, and placenta begin forming. Baby is the size of a poppy seed by the end of this month.

🤰 Mom's body

You may not know you're pregnant yet. A missed period is the first clue. Fatigue, breast tenderness, and light spotting (implantation bleeding) are possible.

🩺 Checkups & to-do

  • ✓ Take a home pregnancy test
  • ✓ Start prenatal vitamins with folic acid (400+ mcg)
  • ✓ Schedule your first prenatal appointment

🥗 Nutrition focus

  • • Folic acid (400–800 mcg daily) — critical for neural tube development
  • • Iron-rich foods: spinach, lean red meat, beans
  • • Avoid alcohol, raw fish, and high-mercury fish

💡 Month 1 tip: Most women find out they're pregnant this month. Start prenatal vitamins immediately — folic acid is most important in the earliest weeks.

This is a general guide based on average pregnancy progression. Every pregnancy is unique. Consult your healthcare provider for personalized advice.

About this guide

This interactive guide covers all 10 months of pregnancy (40 weeks), organized month by month. Each section includes baby's developmental milestones, common symptoms you may experience, recommended checkups and vaccinations, and nutrition priorities for that stage.

Based on guidelines from ACOG, CDC, and Mayo Clinic. Every pregnancy is unique — consult your healthcare provider for personalized advice.