Pregnancy Timeline
Key milestones from week 1 through birth.
First Trimester
Weeks 1–13
Positive pregnancy test
Your baby has implanted and hCG levels are rising — a home pregnancy test can now turn positive. The journey is officially confirmed.
Heartbeat detectable on ultrasound
Baby's heart is now beating — often visible on an early ultrasound. This is one of the first magical milestones.
First prenatal appointment
Every major organ system is developing. Baby is moving (though you can't feel it yet) and growing steadily.
Embryo becomes a fetus
Your baby graduates from embryo to fetus this week — a meaningful milestone. All organs are formed and will now grow and mature.
End of First Trimester
The first trimester is over. Baby has all its essential organs and systems. The weeks ahead bring more growth and your first chance to feel movement.
Second Trimester
Weeks 14–27
First felt fetal movement (quickening)
Most parents feel clear fetal movement for the first time around now. Those first kicks are among the most treasured moments of pregnancy.
Halfway point — Anatomy scan
You've reached the halfway point of your pregnancy — 20 weeks. This week's anatomy scan gives the most detailed view of your baby yet.
Viability milestone
Week 24 is a profound milestone — baby has reached the point of viability, meaning survival outside the womb is medically possible with support.
End of Second Trimester
This is the final week of the second trimester. Baby is growing strong, and you're about to begin the last chapter of this remarkable journey.
Third Trimester
Weeks 28–40
Third Trimester begins
Welcome to the third trimester. Baby is growing rapidly, preparing for birth, and the final countdown has begun.
Lungs nearly mature
Baby is practicing breathing, sucking, and swallowing in preparation for life outside the womb. Things are moving toward the finish line.
Baby engages — lightening
Baby is likely settling into the pelvis now — a process called 'lightening.' Breathing may feel easier, though pelvic pressure increases.
Early full term (37 weeks)
Your baby is now considered early full term. If labor begins today, your care team will not try to stop it. The wait is almost over.
Full term
You've reached full term. Baby is ready. Your body is ready. The moment you've been moving toward for nine months is very close.
Due date — 40 weeks
This is the week your due date falls. Only 5% of babies arrive exactly on their due date — but you are ready, and baby is coming.