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How big is a fetus at 3 months?

Updated: 10/6/2023
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12y ago

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Ineresting question. I presume you mean human fetus. At 14 weeks the human fetus is leaving its first trimester.

It would nominally be about the length of an adult index finger (3.5 inches) and about 1-2 ounces. It would have discernible eyes, fingers, toes, nose ...

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14y ago
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12y ago

After three months of development (12 weeks), your baby is already 2 and a half inches long!

By now, her little feet are about a centimeter in length, and they already are growing beautiful little toenails. In addition, she can suck her thumb, which also has a fingernail of its own.

Around this time, her facial features are starting to form into the beautiful face. It's incredible to think that 50% of the genes making up those features came from you! It will be so exciting to see how much she resembles you in the years to come!

Starting at this stage, you will probably be able to hear your baby's tiny heart beating when you listen with an ultrasound.

Her vocal cords have fully formed now! Sometimes, she will cry silently in the womb.

Her nervous system is continuing to develop, and she can feel more pain now.

She is growing silky soft hairs on her head!

The vital organs are continuing to form, and by this time, her kidneys are working just as they should!

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Wiki User

8y ago

Your baby is 4 inches long and weighs more than 2.4 ounces now

about size of lemon


It's about 4 inches long. The Mayo clinic in LA have so you can follow the pregnancy step by step online on their site.
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Wiki User

8y ago

A 7 week old fetus is around 1cm in length. The growth is really quick at this stage and it will probably be around 1.6cm by week 8 and 2.3cm by week 9. Hope this is helpful.
Mine measures 10 mm (7 wks) & the doc said that it's growing really well as it measured 2.9mm 10 days ago. Hope this helps.

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14y ago

A fetus at 36 weeks is about 17-18 inches long and weighs about 5 and a half pounds.

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Wiki User

16y ago

A FETUS AT 30 WEEKS IS ABOUT 3/4 POUNDS

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Wiki User

12y ago

82.3mm

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Anonymous

Lvl 1
3y ago

4cm

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Q: How big is a fetus at 3 months?
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