Pregnancy by trimester
Overview of all three trimesters with key changes and the weeks in each stage.
Weeks 1–13
First Trimester: Laying the Foundations of Life
The first 13 weeks of pregnancy are the time when all organs and systems of your baby are formed. You may experience the early pregnancy symptoms and adapt to new sensations.
Weeks 14–27
Second Trimester: The Golden Period of Pregnancy
Weeks 14-27 of pregnancy are often called the "golden period". Energy returns, the belly starts to grow, and you can feel the baby's first movements.
Weeks 28–40
Third Trimester: The Final Stretch to the Meeting
Weeks 28-40 of pregnancy are a time of active preparation for birth. Your baby is almost ready to enter the world, and you are preparing for the most important event of your life.