Pregnancy Home > 16 Weeks Pregnant

At 16 weeks pregnant, your baby is about 4.3 to 4.6 inches long. It may suck its thumb and show facial expressions, such as frowning and squinting. When you're 16 weeks pregnant, you may begin to feel your baby moving inside you. Other things you may experience during week 16 of pregnancy may include a stuffy nose, nosebleeds, bleeding gums, and swollen feet.

16 Weeks Pregnant: An Overview

You are 16 weeks pregnant! As your baby continues to grow, it is probably getting a bit snugger inside your belly. Around this time in your pregnancy, you are more likely to feel your baby moving. These movements are called "quickening" -- they feel like butterflies or gas. Quickening usually starts somewhere between week 16 and week 22 of pregnancy.
At 16 weeks pregnant, it's a good time to talk with your healthcare provider about the different tests available to look for genetic problems (see the "Lesson of the Week" in this article).

Your Baby's Development at Week 16 of Pregnancy

By the time you are 16 weeks pregnant, your baby is between 4.3 and 4.6 inches long and weighs about 3 ounces. During the sixteenth week of pregnancy, your baby can open its mouth, move its lips, and swallow. Other things that are happening in your baby during week 16 of pregnancy include the following:
  • Your baby may be sucking his or her thumb
  • Facial muscles may lead to various expressions, such as squinting and frowning
  • The heart is beating 117 to 157 times per minute
  • The stomach is producing digestive juices
  • The kidneys are producing urine
  • For females, millions of eggs are forming in the ovaries.
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Last reviewed by: Arthur Schoenstadt, MD
Last updated/reviewed:
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