Your baby is conceived
January 14, 2026
Baby's Size This Week
Week 21
Carrot
Your baby is about the size of a carrot this week
10.51 inches
26.7 cm
Length
12.70 ounces
360 grams
Weight
Baby Status
Heart Rate
110-180 bpm
Estimated Kicks
~500so far
Hiccup Episodes
~4per day
Sleep Time
90–95%of the time
Listen to Your Baby's Heartbeat
Week 21 - Your baby's heart beats with life
145
BPM
Your baby's heart has beaten 24,595,214 times since conception
Pregnancy Achievements
Heartbeat Hero
Week 6 - Heart starts beating
Tiny Human
Week 10 - All organs formed
1st Trimester Champion
Week 13 - First trimester complete
Halfway There!
Week 20 - 50% complete
Viability Victory
Week 24 - Baby could survive outside womb
Dream Weaver
Week 28 - REM sleep & dreaming begins
Significant Milestones in Embryo/Fetal Development
✨
Week 2
🧪
Positive pregnancy test
January 28, 2026
Week 4
❤️
Organs begin to form, heart starts beating
February 04, 2026
Week 5
🩺
Major organs have formed, heart can be heard
March 11, 2026
Week 10
🛡️
Second trimester, risk of miscarriage decreases
March 25, 2026
Week 12
📢
Now is a good time to announce your pregnancy
April 08, 2026
Week 14
👁️
Your baby can now see light
April 15, 2026
Week 15
🔍
Your baby's gender is visible on ultrasound
April 22, 2026
Week 16
🤰
You can feel your baby move around
May 06, 2026
Week 18
👂
Your baby can now hear sounds
May 13, 2026 - You are here
Week 19
🏥
Premature babies have a chance to survive
June 10, 2026
Week 23
🌬️
Third trimester, your baby can breathe
July 08, 2026
Week 27
💅
Fingernails and toenails have formed
August 12, 2026
Week 32
✅
Your baby is now considered full term
September 16, 2026
Week 37
🎉
Your baby is due any time now!
October 07, 2026
Week 40
Weekly Development Progress
Healthcare professionals will now liken your baby to a carrot or banana when giving you an indication of size. 10.5 inches is about average, and about 12.5 ounces. He or she has certainly done a lot of growing lately, but there's still much more to come.
Your baby's taste buds have been developing over the past several weeks and are now becoming functional - your baby can actually taste while in the womb! Much like how our diets influence bodily secretions (I'll say no more...!), what we eat can also change the taste of amniotic fluid. That may seem strange, but what's even more bizarre is that research has found a link between the taste experienced in utero and the dietary preferences of not only babies and toddlers but adults too!
Video & Ultrasound Pictures
Video
Development Week 21 Video
Ultrasound Week 21 Picture
Ultrasound Week 21 Picture
Baby's Weight Journey
Your baby weighs approximately
12.7 oz
(360g)
+2.1 oz this week - about the weight of an egg!
Baby's growth curve (weeks 8–42)
What Your Baby Can Hear
Your baby can hear! Here's what they're listening to right now:
Your heartbeat
The most comforting sound - a constant rhythm of ~80 bpm
Blood flowing
A whooshing sound similar to white noise
Digestion
Gurgling and rumbling from your stomach and intestines
Click a sound to hear what it sounds like inside the womb. Synthesized using Web Audio API.
Hearing Development Timeline
Week 6
Inner ear begins forming
The cochlea and vestibular system start developing from the otic placode.
Week 16
Ears reach final shape
The outer ears are now fully formed and in their correct position on the head.
Week 18
First sounds detected
Baby begins to hear internal sounds: your heartbeat, blood flow, and digestive system.
Week 22
Responds to voices
Baby can hear your voice and may respond to it with movement. They prefer low-pitched sounds.
Week 25
Reacts to music
Baby can hear music and external sounds. Studies show babies prefer classical and soft music.
Week 27
Startles at loud noise
The auditory system is mature enough to startle at sudden loud sounds.
Week 32
Recognizes your voice
Baby can distinguish your voice from others and shows a preference for it after birth.
Week 35
Remembers music
Research shows babies can remember and recognize melodies heard in the womb after birth.
💡 Tip: Talk, sing, and play music for your baby! Research shows that babies recognize sounds they heard frequently in the womb, and it can be soothing for newborns.
Want to recalculate? Go back to the calculator.