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    Pregnancy Timeline Video Series

    • 1st Trimester Timeline
    • How Baby Grows: 1st Trimester
    • Dos and Don'ts
    • How to Beat Fatigue
    • Weird Body Changes
    • Best and Worst Foods
    • Weight Gain
    • How Baby Grows: 2nd Trimester
    • Baby Movements
    • Sleep-Better Tips
    • How Baby Grows: 3rd Trimester
    • 3rd Trimester Dos and Don’ts
    • Labor Checklist
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    • Pregnancy
    • Pregnancy Timeline

    Baby Growth in the First Trimester

    Video Transcript

    From fertilized egg to garlic bulb-sized baby, your little one quickly goes through some amazing changes during her early weeks in your womb. She starts to take shape during week 5, transforming from an egg into an embryo. Her umbilical cord forms, which connects her to your blood supply.

    She's big enough to measure by week 6. But big is relative. She's just an eighth of an inch long. Her heart and lungs are growing too.

    Next week, she's the shape of a tiny tadpole and roughly the size of a pomegranate seed. Teeny limb buds are forming. Eventually, they'll become her arms and legs. Her eyes, mouth, and stomach are starting to take shape too.

    Your little one is about as big as a coffee bean by week 8. She can move around and swim now. Her tiny webbed fingers and toes are growing. Plus, her major organs have almost totally formed.

    Next week, she's the size of a peanut. Her little eyelids are growing in. And her tiny nose appears too. Her skeleton also starts taking shape, although the bones are soft.

    Your baby may be 1 inch big by week 10. That makes her about the size of a green olive. Her fingers and toes are becoming distinct, and her arms bend at the elbows.

    During week 11, your little one might double in size to 2 inches. She's the size of a strawberry, and her teeth, intestines, and genitals are forming. By the end of your first trimester, your baby is almost as big as a 2 and 1/2-inch bulb of garlic. Her profile, complete with tiny nose and chin, have grown in too. She's come a long way this first trimester, and she's got a lot of growing left to do.

    Your Pregnancy Timeline

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      Pregnancy Milestones Timeline
    • 1:41
      Baby Growth in the First Trimester
    • 1:28
      'Can I Have Sex?' Top Pregnancy Dos and Don'ts
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      Ways to Boost Energy Throughout First Trimester
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      7 Body Changes to Expect While You're Pregnant
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      3 Types of Foods to Eat and 4 to Skip While Pregnant
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      Pregnancy Weight Gain
    • 2:17
      Baby Changes Through the Second Trimester
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      How It Feels When Your Baby Moves Around
    • 1:21
      7 Tips to Sleep Better While You're Pregnant
    • 1:56
      Baby Growth in the Third Trimester
    • 1:14
      What You Can and Can't Do in Your Third Trimester
    • 2:10
      Checklist: Get Prepared to Go Into Labor
    • 1:15
      Countdown to Baby: 5 Signs of Labor
    • 2:04
      Countdown to Baby: What Happens During Labor
    • 2:02
      Countdown to Baby: What Happens During Delivery

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