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Why Are Eggs Shaped Like Eggs? And Why Are Some Small and Others Extra-Large?

Hey there, egg enthusiasts! I’m Michael Jimenez, the 22-year-old owner and farmer at JMZ Farms. Today, I’m here to crack open some egg-citing mysteries with you. Have you ever wondered why eggs are shaped the way they are or why some are small while others are extra-large? Let’s dive in and find out!


Why Are Eggs Shaped Like Eggs?

First off, why do eggs have that unique shape? They’re not perfectly round like a ball or flat like a pancake. Instead, they have a cool oval shape with one end slightly larger than the other. This shape is called an "ovoid." But why is this?

  • Strength and Protection: The ovoid shape makes the eggshell super strong. Imagine an egg rolling around in a nest. The curved shape helps it withstand pressure from all sides, so it doesn’t easily break. It’s like a natural safety helmet for the baby chick inside!

  • Rolling in Circles: If an egg were perfectly round, it could roll away easily. But because of its shape, if it rolls, it tends to move in a circle. This helps keep the eggs safe and close to their nest.

  • Space Efficiency: The egg’s shape allows it to fit snugly in the nest with other eggs. This is important because it keeps them warm and safe until they’re ready to hatch.

Why Are There Small Eggs and Extra-Large Eggs?

Here at JMZ Farms, our hens lay eggs of all sizes, from small to extra-large. But why does this happen?

  • Hen’s Age: Younger hens, called pullets, usually lay smaller eggs. As they grow older, their eggs get bigger. Think of it like how a young tree might produce small fruit, but as it grows, the fruit gets larger.

  • Hen’s Breed: Different breeds of chickens lay different sizes of eggs. For example, Leghorn chickens are known for laying large white eggs, while Bantam chickens lay smaller eggs. It’s like how different dog breeds come in different sizes.

  • Hen’s Health and Diet: Healthy hens that eat a balanced diet lay better quality eggs. At JMZ Farms, I make sure my hens get the best organic feed and plenty of time to roam and peck at the grass. This keeps them happy and healthy, and they reward us with delicious eggs of all sizes.

  • Seasonal Changes: Believe it or not, the time of year can affect egg size too. In the spring, when the days get longer, hens often lay more and sometimes larger eggs. It’s like how some plants bloom more in the spring.


What Causes Different Egg Sizes?

Now let’s get into what causes the size differences inside the hen.

  • Ovary Size: Inside the hen, there’s an ovary that produces yolks. In younger hens, the ovary might release smaller yolks, leading to smaller eggs. As the hen matures, the ovary can release larger yolks.

  • Hormones: Hormones control egg production. When a hen starts laying eggs, her body is still getting used to the process. Over time, as her hormone levels stabilize, the eggs get larger.

  • Environmental Factors: Stress, temperature changes, and even the amount of daylight can influence egg size. Hens that are relaxed and comfortable tend to lay larger eggs.

Fun Facts About Eggs

  • Double Yolkers: Sometimes, a hen will lay an egg with two yolks! This usually happens with younger hens whose bodies are still figuring things out.

  • Shell Colors: Eggs come in different colors, like white, brown, and even blue or green! The color of the eggshell is determined by the breed of the hen.

  • Eggs for Days: Did you know a single hen can lay about 250 to 300 eggs a year? That’s a lot of breakfast!


Why We Love Our Eggs

At JMZ Farms, I take pride in my organic pasture-raised eggs. My hens live happy lives, roaming on a 5-acre farm in Colleyville, TX. They enjoy fresh air, sunshine, and a healthy diet, which helps them lay the best eggs possible.

So, next time you crack open an egg, remember the journey it took to get to your plate. From the shape of the egg to the size, there’s a lot more to these little wonders than meets the eye.

Get Your Fresh JMZ Farms Eggs Delivered!

If you love what you’re reading and want to enjoy our fresh, pasture-raised eggs, why not subscribe to the egg delivery service? Head over to and sign up for our egg subscription. When you order 4 dozen or more, I’ll deliver them straight to your door! It’s a convenient way to enjoy the best eggs around without leaving your home.

Love JMZ Farms? Check Out Our Merchandise!

Do you enjoy my eggs and the farm? Show your support with some JMZ Farms merchandise! I have hats, hoodies, short and long-sleeve t-shirts, and mugs. Whether you’re sipping your morning coffee or staying cozy on a chilly day, my merch is perfect for any fan of JMZ Farms. Visit to browse the collection and make your purchase.

Thanks for visiting JMZ Farms! If you have any questions or want to learn more about our eggs and hens, feel free to ask. I'm always happy to share the amazing world of eggs with you!

Keep clucking!

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