Do chickens have vaginas?

For anyone raising chickens for eggs, understanding the chicken’s vaginal function is essential for recognizing any problems and taking corrective action.

So, do chickens have vaginas? The female chicken reproductive system has an ovary and an oviduct. And vaginas are part of the chicken’s oviduct. Keep in mind that a chicken doesn’t have a separate vaginal structure but features an egg-laying vent or orifice. 

This article will explain everything you need to know about a chicken’s vaginal function.

Let’s get started.

What’s A Chickens Private Part Called?

A chicken’s private part or egg-laying orifice is called a cloaca. And if you’re wondering whether chickens have vaginal sex, here’s a quick answer:

The rooster injects sperm into a female chicken by pressing his vent against hers in a process known as the cloacal kiss. The cloaca is the chamber inside the vent where the digestive and reproductive tracts end.

The Food Test: Do Chickens Have Vaginas?

Female Chicken Reproductive System & Vagina Function  

Ovum (yolk)

When ovulation occurs, the ovum enters the oviduct. The oviduct is a twisted tube about 25 inches long when fully developed and is divided into five major sections. These sections are called the infundibulum, magnum, isthmus, shell gland, and vagina.


This funnel is the first part of a chicken’s oviduct. The infundibulum is 3 to 4 inches long and engulfs the ovum released from the ovary. The released egg yolk stays in place, and the muscular infundibulum re-adjusts to surround it. The egg yolk remains in the infundibulum for about 1 minute. If fertilization occurs, it’ll take place in the infundibulum.


The next part of the oviduct is the magnum. At about 13 inches long, it is the largest section of the chicken’s oviduct. The yolk remains here for 3 hours, during which the egg white forms.


The third section of the chicken’s oviduct is the isthmus, which is 4-inches long. The isthmus is where the egg’s inner and outer shell membranes form. The developing egg stays here for 75 minutes.


The next part of the oviduct is the shell gland, which is 4-inches long. Here, the shell forms on the egg. The shell is made of calcium carbonate. The female chicken’s body mobilizes about 8-percent of body calcium from its bones to make the egg’s shell. The egg stays there for up to 20 hours.


The last section of the chicken’s oviduct is the vagina, about 4 inches long. The chicken’s vagina does not play a part in egg formation but helps in laying the egg. The chicken’s vagina is made of muscle that helps push the egg out of its body. The bloom forms on the egg in the vagina before the hen lays the fully formed egg. 

Deep glands near the female chicken’s vagina are known as sperm host glands that can store sperm for up to 2 weeks. When a hen lays a fully formed egg, sperm can be squeezed out of these glands into the chicken’s oviduct and migrate to the infundibulum to fertilize an ovum.

How many holes does a chicken have?

Unlike humans and most mammals, a female chicken has but one hole called cloaca with three functions. It is where feces and eggs exit her body and sperm enter.

Do chickens poop and lay eggs from the same hole?

Chickens only have one hole for their bodily functions; it’s no surprise that the eggs are released from the same hole as their poop and pee.

Realizing this often discourages people from eating eggs, but it really shouldn’t. Firstly, chickens aren’t able to poop and lay eggs at the same time. If they were, it would cause a mess.

Here’s why that’s not possible:

When a chicken is in the process of laying an egg, its uterus extends to make a barrier to its digestive system. This is a natural defense against pooping and laying an egg at the same time. But it doesn’t mean you’ll never find poop stains on an egg in your chicken’s nest boxes.

If you find poop stains on an egg, it’s probably because a chicken has pooped on the egg after it was laid.

Related Questions

What is a cloaca?

It’s a cross between a butthole and a vagina. It’s a chicken’s egg-laying orifice and is also used for excrement purposes.

Does A Chicken Have an Anus?

Chickens have an opening called a cloaca. Cloaca is another name for a chicken’s anus and vagina. Feces and eggs pass through this opening, but not at the same time.

How often do chickens lay eggs?

Chickens lay eggs about once a day and up to 250 eggs per year.

Leave a Comment