Trimester 2
Week 16
About the size of
an avocado
~11.6 cm~100 g
Averages only: a scan is the only way to know your baby’s size.
Your baby this week
Muscles and bones strengthen enough for coordinated movement. The heart pumps around 25 litres of blood a day.
What you may feel
Some people feel the first flutters of movement now, especially in a second or later pregnancy.
This week, try
Do not worry if you feel nothing yet: first-time parents often do not notice movement until 20 weeks or later.
Weeks are counted from the first day of your last period, as your care team counts them. Written by The Childhood Journal’s team from standard prenatal references. Not yet reviewed by a clinician: our scientific board is being formed. General information, never an assessment of your pregnancy.