6 Weeks 4 Days Pregnant - Your Baby's Lungs & Limbs Are Forming Today

At 6 weeks and 4 days pregnancy, the early limb bud that will form your baby’s right arm can be seen. The upper limb buds appear before the lower limb buds. At this early stage, the hands and fingers are not yet developed. Your baby’s lungs won’t be fully developed until late in pregnancy, but the foundations are being laid down right now.

6 Weeks 4 Days Pregnant Progress Check  

In the 7th week of pregnancy, your baby’s lungs are starting to develop. This begins with a small lung bud branching out from the upper part of the tube (oesophagus) between your baby’s mouth and stomach. This lung bud forms the main windpipe or “trachea”, which then divides into two main branches (bronchi) that will eventually form your baby’s right and left lungs. These bronchi continue to branch into smaller tubes, a process that will be repeated many times.

Your baby’s gut is also starting to develop, from the mouth downwards. At the beginning of this week, his future digestive system consisted of a simple tube, closed at each end, that lay along his entire length. The tube remains closed but the oesophagus has now started to separate from the trachea and connect to the stomach. The swelling that will become your baby’s stomach forms around the centre of his body, but undergoes a 90-degree rotation to lie more on the left-hand side.

Buds arise from the duodenum (the