Whether it is your first child or your tenth, it is exciting during pregnancy to learn about your baby’s development each week. I know more about pregnancy and fetal development now that I did when I was pregnant with my first daughter, but I’m still just as amazed to see how babies develop during pregnancy.
Here’s a look at your baby’s development during week 9 of pregnancy.
Although exact size varies from baby to baby, during the 9th week of pregnancy most babies are nearly an inches long. This is measured from “crown to rump” (head to bottom), and does not include their legs in the length. At this point in fetal development, this is the most reliable way to measure them. (If you go in for an ultrasound, they will measure your baby during the scan to check development and verify your dates.) Your baby weighs about an ounce (about the same amount as a plain slice of bread).
Despite how tiny your baby is, they are amazingly well developed. Just seven weeks ago, your baby was just two cells. Now your little baby is beginning to look like a baby (even if they still kind of look like a kidney bean in a traditional ultrasound). Their organs, muscles, nerves, etc. are all developing at a rapid rate. At this stage, your baby is still not proportioned the way that they will be at birth. Their head is extremely large in proportion with the rest of their body, and their arms and legs still seem quite small. Around this time fingers and toes become distinguishable, although they are usually still webbed together.
Up until this point, your baby has been mostly stationary. Around week 9, though, your baby starts to get a little bit of muscle control and both muscles and the nervous system are developing. This means that your baby starts to move around about now. They are not very controlled movements, yet, but babies at this stage have been seen moving around. They may stretch out, move their head, etc. At this stage they are still too small and weak for you to be able to feel the movements, though. You won’t begin to feel their movements until well into the second trimester. (Most women don’t feel the first kick until about week 19, but it is not unusual to feel it several weeks earlier or later than that. I felt my second daughter move much earlier than my first.)
To see a traditional scan picture taken during the 9th week of pregnancy (on a pregnancy blog), click here.
For a clearer picture of a baby during week 9, click here.