reviewed mark Medically Reviewed by Aaron Styer, M.D.  | September 26, 2024

Your Pregnancy Timeline

From Mar 27 to Jun 25
From Jun 26 to Oct 1
From Oct 2 to Jan 1
Did You Know?
Only 1 in 20 babies are born on their actual due date. A normal pregnancy often lasts from 38 to 42 weeks, which keeps the majority of parents guessing right up until delivery day. Download the What to Expect app to track your pregnancy week-by-week!

Pregnancy Week 21 Highlights

Your baby is as big as a large banana.
Your baby is as big as a large banana.
At 21 weeks pregnant, your baby is the size of a large banana. Baby will start developing his sense of taste in utero. You may notice some stretch marks.

Fun Facts About January 1 Babies

Your baby’s birthstone will be a garnet
Your baby’s birthstone will be a garnet

This dark red gemstone is the color of a pomegranate seed and is believed to promote balance and peace.

Betsy Ross was born on January 1, 1752
Betsy Ross was born on January 1, 1752

Although seamstress Betsy Ross purportedly sewed the first American flag in 1776, she wasn’t credited with this work during her lifetime. In fact, her story was first publicly relayed to the Historical Society of Pennsylvania nearly a century later, in 1870, by her grandson, William Canby.

Diane Keaton was born on January 5, 1946
Diane Keaton was born on January 5, 1946

Diane Keaton is an award-winning actress known for films including Annie Hall, Something's Gotta Give and The Godfather.

Your baby will be a Capricorn
Your baby will be a Capricorn

Your little one will be independent, polite, serious and disciplined.

Recommended Products

What to Expect selects products based on real-life testing conducted by staff, contributors and members of our user community, as well as independent research and expert feedback; learn more about our review process. Prices and details are accurate as of the published date. We may earn commissions from shopping links.

The 8 Best Prenatal Vitamins That OB/GYNs Recommend — and Moms Actually Take
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Nature Made Prenatal Multivitamin Folic Acid + DHA
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Theralogix TheraNatal Core Preconception Vitamins
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New Chapter Advanced Perfect Prenatal Multivitamins
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What Other January 2026 Moms Are Talking About

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