The Fourth Month of Pregnancy

14 Weeks Pregnant

Your tiny little one can now do a number of amazing things.

Your baby’s expressions are almost visible now. Facial muscles and brain impulses are developed enough that they can now squint, frown, grimace and even grasp. You may notice this when you have your ultrasound, where your baby may appear to suck their thumb. Your little one now measures around 11 centimetres. Their arms are growing longer to be more proportionate to the body, which is covered in a soft downy hair called lanugo. Their limbs have now become more flexible and active.

Find out more about your fourteenth week of pregnancy.

15 Weeks Pregnant

Your baby can now sense light.

Your baby now measures around 12cm and weighs about 80 grams. Lung sacs now start to develop, legs start growing, and your baby can now move its limbs. Taste buds, though formed, are not of much use to your baby at this stage.

Find out more about your fifteenth week of pregnancy.

16 Weeks Pregnant

Your baby is getting ready for a phase of rapid growth.

Right now, at around 12.5 centimeters long, your baby is about to experience a growth spurt over the next few weeks. Their legs and head are more developed, and their eyes and ears look more like how they will look eventually. Your little one can also sense light and move away from it. Their heart is now pumping greater volumes of blood than before and this amount is expected to increase in the coming weeks.

Find out more about your sixteenth week of pregnancy.

17 Weeks Pregnant

Your baby can now move its bone joints.

Your baby’s little skeleton is now changing from soft cartilage to bone and the umbilical cord is growing stronger and thicker. Weighing around 150 grams, your baby is about 13 centimeters long. As everything gets set up for their sense of taste, your baby will soon be able to tell the difference between sweet and bitter.

Find out more about your seventeenth week of pregnancy.

Here's what to expect in the fifth month of pregnancy.