Week 5 · First trimester
Week 5, gently.
Your baby is the size of
an apple seed
- 0.3 cm long
The heart is already pulsing, even though it is barely a tube.
“A heart that starts beating now never really stops.”
What’s happening inside
The heart forms as a simple tube and begins to pulse — a quiet rhythm that will not stop for a lifetime. The beginnings of the brain, spine, and gut are taking shape.
How you might feel
Early pregnancy symptoms often begin or intensify — tender breasts, fatigue, frequent peeing, food aversions. Some days you will feel fine; others you will feel flattened.
