Healthwise

Our Health Library information does not replace the advice of a doctor. Please be advised that this information is made available to assist our patients to learn more about their health. Our providers may not see and/or treat all topics found herein.

Week 20 of Pregnancy: What's Going On Inside

Topic Overview

By week 20, you've probably felt your baby move. It may not feel like an obvious kick—yet! Instead, your baby's first movements might feel like "butterflies" or gas bubbles.

Inside the uterus, your baby is enjoying some regular activities: thumb-sucking and opening and closing his or her eyes.

Wondering what your baby looks like now? As you enter your sixth month of pregnancy, your baby is now about the size of a banana. Average baby length is 160 mm (6.3 in.).

How your baby is changing

Here are some of the important facts and developments around 20 weeks.

  • This is a time of very rapid growth, especially from 15 to 18 weeks of pregnancy.
  • By now, the head is no longer so big compared to the rest of the body.
  • You can see bones on ultrasound by the end of week 17.
  • At this size, your fetus is still small enough to change position a lot—from head-down to feet-down, or even sideways.
  • If this is your first pregnancy, you will start to feel your fetus move. The first flutters you feel are called "quickening."
  • At the end of this month, the fetus starts building up body fat.

Credits

Current as of: June 16, 2021

Author: Healthwise Staff
Medical Review:
Adam Husney MD - Family Medicine
Kathleen Romito MD - Family Medicine
William Gilbert MD - Maternal and Fetal Medicine

Due to the threat of the COVID-19 (Coronavirus), we are taking precautionary measures to protect our staff and patients. We are implementing a temporary NO VISITOR policy at this time. Only patients or patients and their guardians will be allowed into the office. Please note, this is not to inconvenience anyone! The virus is a very real threat and it is essential that we stay healthy in order to provide needed care for our patients. If you are sick, we ask that you CALL the office to speak with a nurse before you come in. The nurse will provide specific instructions for you. Please DO NOT enter the office if you are sick (upper respiratory symptoms, fever, cough, or flu like symptoms). We are closely monitoring the situation and will update you as circumstances change. Thank you for your understanding!!