Your baby is conceived
November 30, 2025
Baby's Size This Week
Week 20
Banana
Your baby is about the size of a banana this week
6.46 inches
16.4 cm
Length
10.58 ounces
300 grams
Weight
Baby Status
Heart Rate
110-180 bpm
Hiccup Episodes
~4per day
Sleep Time
90–95%of the time
Listen to Your Baby's Heartbeat
Week 20 - Your baby's heart beats with life
145
BPM
Your baby's heart has beaten 22,304,722 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
December 14, 2025
Week 4
❤️
Organs begin to form, heart starts beating
December 21, 2025
Week 5
🩺
Major organs have formed, heart can be heard
January 25, 2026
Week 10
🛡️
Second trimester, risk of miscarriage decreases
February 08, 2026
Week 12
📢
Now is a good time to announce your pregnancy
February 22, 2026
Week 14
👁️
Your baby can now see light
March 01, 2026
Week 15
🔍
Your baby's gender is visible on ultrasound
March 08, 2026
Week 16
🤰
You can feel your baby move around
March 22, 2026
Week 18
👂
Your baby can now hear sounds
March 29, 2026 - You are here
Week 19
🏥
Premature babies have a chance to survive
April 26, 2026
Week 23
🌬️
Third trimester, your baby can breathe
May 24, 2026
Week 27
💅
Fingernails and toenails have formed
June 28, 2026
Week 32
✅
Your baby is now considered full term
August 02, 2026
Week 37
🎉
Your baby is due any time now!
August 23, 2026
Week 40
Weekly Development Progress
Once again, your baby has done some serious growing in the last week, and is now expected to weigh about 10.5 ounces. Based on your baby's measurements which will be taken during the scan (which should be about 6.5 inches from head to bottom, and then an extra 4 inches for the legs), your sonographer may be able to provide a more accurate weight.
Your baby is starting to swallow more and more of the amniotic fluid now, and the digestive system is working hard. This means that your baby's first "number 2" is bulking up. Known as meconium, this green/black sticky poop is likely to fill up your baby's first diaper nicely.
Video & Ultrasound Pictures
Video
Development Week 20 Video
Baby's Weight Journey
Your baby weighs approximately
10.6 oz
(300g)
+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.
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