The fetus enters a rapid growth phase. Bones harden, and muscles develop. You might feel more energetic as nausea subsides.
Week 8 - Major Organs Develop
Pregnancy Basics
Week 31 - Bone Strengthening
Week 10 - Fingernails Form
Week 33 - Fat Accumulation
Fertility Test Basics: Your Guide to Tracking Pregnancy
Week 40 - Ready for Birth
Week 12 - End of First Trimester