Skip to content
My WebMD Sign In, Sign Up

Health & Pregnancy

Font Size

Twins Development 3rd Trimester Highlights

At last your twins are ready for birth. Over the past three months, they've gained fat, muscle tone, and mature lungs. They're ready to kick, to cry, to smile, and to grasp your finger in their tiny fists! At the end of this trimester, your twins have:

  • Muscle tone from moving all about.
  • Eyelids that open -- complete with eyelashes. 
  • Toenails. 
  • Sweet smiles.
  • The ability to kick, grasp, and stretch.
  • Eyes that open and close and respond to changes in light.
  • Possibly, full heads of hair. 
  • Fully formed hearts, brains, and nearly all other organs and body systems.
  • Testes that have descended into a baby boy's scrotum.
  • Fingernails that reach to the end of the babies' fingers.
  • About 16% body fat.
  • Pink, smooth skin and chubby legs.
  • Bones and muscles ready for the outside world.
  • Lungs ready to breathe and cry.

WebMD Medical Reference

Reviewed by Matthew Brennan, MD on October 02, 2012

Pregnancy Week-By-Week Newsletter

Delivered right to your inbox, get pictures and facts on
what to expect each week of your pregnancy.

Today on WebMD

Woman smiling as she reads pregnancy test
Slideshow
pregnant woman with salad
Quiz
 
pregnancy am i pregnant
Article
babyapp
NEW
 

slideshow fetal development
Slideshow
pregnancy first trimester warning signs
Article
 
What Causes Bipolar
Video
Woman trying on dress in store
Slideshow
 

pregnant woman
Article
Close up on eyes of baby breastfeeding
Video
 
healthtool pregnancy calendar
Tool
eddleman prepare your body pregnancy
Video