At 16 weeks, you’re officially four months pregnant and probably paying close attention to all the changes that are happening in your body. It’s an exciting time for you and your baby, who is now looking more and more like a mini human.
You may also be wondering what symptoms you should be looking out for at 16 weeks pregnant, and how your pregnancy hormones might be affecting you. From an increased appetite to feeling your baby move for the first time, here’s what you might experience this week, plus advice on navigating the changes from a Flo expert.
Your baby at 16 weeks pregnant
Gaining facial expressions
At 16 weeks, your baby is gaining facial expressions and pulling mini smiles and frowns at random. It’ll be a while before they can control their expressions, but by 37 weeks, they’ll be practicing smiling and frowning.
Developing a functioning nervous system
As well as making random facial expressions, this week your baby will be able to start moving their arms and legs as their nervous system develops. Their tiny hands may even be able to form little fists and start punching around inside your belly. A critical system, the nervous system will be fully formed by 33 weeks and will affect everything from movement to memory.
How big is a baby at 16 weeks?
Length (crown to heel): 186 mm or 7.3 in.
Weight: 146 g or 5.2 oz.
Size: Equivalent to an avocado
All measurements are approximate and vary within the normal range.