Week 16

Second Trimester

Expressions and Movement

Baby is making facial expressions and moving constantly — you may start to feel those first gentle flutters soon.

This week's tip

💡 Sleep on your left side this week — it improves blood flow to the baby and your kidneys, and a pillow between your knees can ease any hip discomfort.

Baby this week

🥑

About the size of

an avocado

Length

11.6 cm

Weight

100 g

Development

  • Baby can make facial expressions: squinting, frowning, yawning.
  • Eyes can move from side to side even though they are still closed.
  • Baby's heart pumps about 25 quarts of blood per day.
  • The skeleton is shifting from cartilage to bone.
  • Baby is very active — flipping, rolling, and stretching.

How you might feel

  • Some women notice their first fluttery fetal movements (quickening) — like butterflies or bubbles.
  • Your center of gravity is shifting as your belly grows.
  • Back pain may begin as posture adjusts.
  • Skin may have a healthy glow — increased blood circulation.

Things to do this week

  • Ask your care provider about quad screening (weeks 15–20) if you're interested
  • Begin sleeping on your side — especially the left — for optimal blood flow
  • Start researching pediatricians in your area
  • Note any early fetal movements in a journal

When to contact your care team

This is general guidance, not medical advice.

  • Contact your care team if you feel severe or one-sided back pain.

Partner tip

Place your hand on the bump regularly — you may not feel kicks yet, but building that habit now is meaningful.