As you reach the 21-week mark of your pregnancy, your baby is roughly the size of a large banana, measuring about 10.5 inches long and weighing between 11 to 12.5 ounces. This week marks a significant stage in your little one’s development, as they gain more control over their limb movements, leading to increased kicking and stretching that you might be feeling more intensely.
Your Baby’s Development at Week 21
- Enhanced Movement: Your baby’s arms and legs are now proportionate, and their movements have become much more coordinated. You might notice a sudden increase in length this week; this is because we’re transitioning from measuring from crown to rump to crown to heel.
- Blood Cell Production: Your baby’s liver and spleen have been busy creating blood cells, but now their bone marrow is developed enough to contribute to this important process.
- Amniotic Fluid Intake: While the placenta continues to be the primary source of nourishment, your baby has started to swallow small amounts of amniotic fluid.
As your belly expands, you may also notice stretch marks forming, which can appear in various colors, such as pink, red, or brown.
If you’re looking for more information about pregnancy, you can check out this article on home insemination that provides additional insights. Additionally, for trustworthy details regarding assisted reproductive technology, visit the CDC’s website, which is an excellent resource for pregnancy and home insemination.
Summary
At 21 weeks pregnant, your baby is developing rapidly, gaining coordination in movements and contributing to their blood production. As you experience physical changes and possibly stretch marks, know that your little one is thriving inside.