Skip to content

    Health & Pregnancy

    Font Size

    Twins Development 3rd Trimester Highlights

    Over the past three months, your twins have gained fat, muscle tone, and mature lungs and are ready to be born! 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.
    • Smooth skin and chubby legs.
    • Bones and muscles ready for the outside world.
    • Lungs ready to breathe and cry.

    WebMD Medical Reference

    Reviewed by Nivin Todd, MD on July 25, 2014

    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

    hand circling date on calendar
    Track your most fertile days.
    woman looking at ultrasound
    Week-by-week pregnancy guide.
    Pretty pregnant woman timing contaction pains
    The signs to watch out for.
    pregnant woman in hospital
    Are there ways to do it naturally?
    slideshow fetal development
    pregnancy first trimester warning signs
    What Causes Bipolar
    Woman trying on dress in store
    pregnant woman
    Woman looking at pregnancy test
    calendar and baby buggy
    dark chocolate squares