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Your Pregnancy Journey in 3D Ultrasound: What’s Happening at 4 Weeks?

Writer: A.S, RDMSA.S, RDMS

Updated: Mar 5

✨ 3D Ultrasound at 4 Weeks

  • It may be too early to see much on an ultrasound.

  • In some cases, a tiny gestational sac may start to appear.

  • By week 5-6, we can usually see more, including a heartbeat!


A combined image depicting the 4th week of pregnancy: a labeled ultrasound image showing the gestational and yolk sacs (top), alongside a Flo medical illustration of the embryo next to poppy seeds (bottom), highlighting the embryo's tiny size at this stage.
A combined image depicting the 4th week of pregnancy: a labeled ultrasound image showing the gestational and yolk sacs (top), alongside a Flo medical illustration of the embryo next to poppy seeds (bottom), highlighting the embryo's tiny size at this stage.

At 4 weeks pregnant, your journey is just beginning! Here’s what’s happening inside your body:


The Baby’s Beginnings

  • The fertilized egg has implanted into your uterus and is starting to grow.

  • Your baby is now an embryo, about the size of a tiny poppy seed!


Your Body’s Changes

  • Your body is producing BhCG (pregnancy hormone)—this is what makes a pregnancy test turn positive!

  • You might start feeling early symptoms like mild cramping, bloating, fatigue, or tender breasts.


Enjoy this exciting time—your little one is just getting started! 💕


Would you like to know what’s next in your 3D ultrasound journey? 😊

 
 
 

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