Pregnancy is an exciting journey filled with incredible milestones. From tiny flutters to seeing their first little smile on a 4D scan, your baby’s growth is nothing short of a miracle.
At Window to the Womb, we offer private ultrasound scans to help you connect with your baby at every stage. Here’s what’s happening inside your womb week by week!
First Trimester (Weeks 6–14)
During the first trimester, your baby is developing at a rapid pace. Though tiny, they are growing essential organs and systems.
6 Weeks: Your Baby’s Heart Starts Beating 💓
Your baby is about the size of a lentil (4-6mm). Their heart has just started beating—twice as fast as yours! The brain, spinal cord, and tiny limb buds are beginning to form.
🔍 Early Viability Scan (6–10 Weeks)
- Confirms your pregnancy
- Detects the heartbeat
- Checks for single or multiple pregnancies
8 Weeks: Tiny Fingers and Toes Begin to Form 🖐️
Your baby is now the size of a raspberry (~16mm). Their face is starting to take shape, with eyelids forming over the tiny eyes. Fingers and toes are developing, though still webbed.
🔍 Dating Scan (8–12 Weeks)
- Estimates your due date
- Measures your baby’s growth
Some of our clinics also offer Early Gender Blood Tests at this gestation, so you can find out your babies gender from 7 weeks!
10 Weeks: Moving Arms and Kicking Legs 🦵
Your baby is now the size of a strawberry (~30mm). They can move their arms and legs, though you won’t feel it yet. Their kidneys are starting to function, producing tiny amounts of urine.
12 Weeks: Fully Formed Baby 🤰
At 12 weeks, your baby is around the size of a plum (~5cm). All major organs are in place and will continue to develop. They are practicing swallowing, and their tiny fingernails are forming!
🔍 Reassurance Scan (12–14+6 Weeks)
- Checks baby’s heartbeat and movement
- Provides reassurance before your NHS anomaly scan
Second Trimester (Weeks 14–28)
The second trimester is when many mums start feeling their baby move! This is also the best time for early gender reveals and 4D scans.
16 Weeks: Baby Can Hear You 👂
Your baby is now the size of an avocado (~11cm). Their ears are developing, and they can start to hear muffled sounds, including your voice! The nervous system is becoming more advanced, and they’re learning to suck their thumb.
🔍 Gender Reveal & Well-being Scan (15+ Weeks)
- Find out if you’re having a boy or girl
- Check baby’s heartbeat, movement & fluid levels
20 Weeks: Baby’s Kicks Get Stronger 🦶
Your baby is now the size of a banana (~25cm) and weighs around 300g. Their kicks are getting stronger, and you may feel them for the first time! Their skin is covered in vernix, a white coating that protects them in the womb.
🔍 Well-being Scan (15+ Weeks)
- Measures baby’s growth and development
- Checks the placenta & umbilical cord
24 Weeks: Baby Can Open Their Eyes 👀
At 24 weeks, your baby is about the size of a corn on the cob (~30cm). Their eyes are starting to open, and they can respond to light and sound. They also develop a sleep-wake cycle and may wake up when you eat something sweet!
Your baby is now the size of a butternut squash (~35cm). They are practicing breathing movements and may smile, yawn, or stick out their tongue!
🔍 4D Scan Experience (24–34 Weeks)
- See your baby’s face in stunning 4D
- Watch them move, yawn, and smile!
26 Weeks: Your Baby Smiles in the Womb 😊
Third Trimester (Weeks 28–40)
Your baby is preparing for birth, gaining weight, and perfecting their movements.
28 Weeks: Baby Has Their First Dream 🌙
Your baby is about the size of an eggplant (~38cm) and weighs around 1kg. Their brain is developing rapidly, and scientists believe they may even experience REM sleep and dreams at this stage!
32 Weeks: Chubby Cheeks Appear! 🍼
Your baby is the size of a coconut (~42cm). Their skin is smoothing out as they store fat, and their once skinny body is now filling out with adorable chubby cheeks. They can now grasp things—like their umbilical cord!
36 Weeks: Baby is Getting Ready for Birth 🤱
At 36 weeks, your baby is about the size of a watermelon (~48cm). They are moving into the head-down position in preparation for birth. Their lungs are nearly fully developed, and they can suck their thumb for comfort.
Your Pregnancy Journey with Window to the Womb
Every stage of pregnancy is special, and our scans give you the opportunity to bond with your baby before birth. Whether you want an early reassurance scan, a 4D bonding experience, or a final well-being check, we are here for you.
