While it will still be a while before baby’s body catches up to {{ PRONOUN_HIS_HER_LOWER }} head size, {{ PRONOUN_HE_SHE_LOWER }} is finally reaching a point where {{ PRONOUN_HIS_HER_LOWER }} limbs are longer and more filled-out. In this illustration, this is shown by the shapes of {{ PRONOUN_HIS_HER_LOWER }} arms and legs, which are more contoured so you can see where the muscles under the skin are starting to develop.
![](https://assets.oviahealth.com/wp-content/uploads/2023/12/article_109206_week-20_s_640_533.jpg)