Chickens Know It: How Does A Rooster Fertilize An Egg?

Chong Lhungdim
Aug 31, 2023 By Chong Lhungdim
Originally Published on Oct 30, 2021
Edited by Jacob Fitzbright
Rooster on green grass
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Age: 3-18
Read time: 8.9 Min

It is quite common to get confused about how a rooster fertilizes an egg or how do they mate, how hens become pregnant, and many more facts related to chickens and hens.

When a hen lays eggs, they are not fertilized and a hen needs a rooster for fertilizing the eggs. A rooster can fertilize up to 10 eggs. For this, the rooster needs to mate with the female and then the sperm travels through their oviduct and fertilizes the eggs that will be laid by the hen.

If a person has maintained a flock then they should need one rooster to expand and to maintain a flock of hens or chickens and make sure that the mating process is still continued between the rooster and the hens.

There are a few steps that are further explained that how does a rooster fertilize eggs of the hen.

Roosters are very active in mating during the springtime and they also exhibit courtship patterns with the hens.

The very first step includes tidbitting, in this the rooster finds the source of a tidbit of food and then they point it out to the hen, the hens are smart enough to not give it right away but they will remember it and will consider it a positive move made by the rooster.

The next move made by the roster is their dance, they perform it to attract the female, they drop one wing towards the ground and then show their moves just to impress the hens, and the moment they try to approach the hen they also try to broad and mate with them.

The mating process between the rooster and hens is relatively quick and the rooster hops on the hen's back after one pattern of the courtship, the female will then squat and drop her head and body.

Sometimes mating takes place once a week, sometimes daily until the hen becomes tired or irritated, but when the female also wants to mate they spread their wings.

When the rooster is in its position then it drops its tail and gives a cloacal kiss.

Roosters are very active in mating for several months and they make sure of the survival of the rest of the flock, mating with hens, fertilizing eggs.

They perform several things including cloacal kiss also delivering sperm in the oviduct. This process will help fertilize eggs and on the basis of a day and also for weeks and afterward.

If you want to learn about similar content, you can also visit these moorhen facts and how far can a horse travel in a day.

How many days does it take for a rooster to fertilize an egg?

It depends upon the rooster as they fertilize a single egg which is called the egg of the day but the sperm can be collected and stored in the sperm pockets and can be used to fertilize the hen's eggs in the upcoming days.

The sperm is good to use for up to two weeks because until this time period they have good fertility.

A rooster is capable of fertilizing up to 14 eggs from a single mating process.

Roosters have the capability of producing 100 million-5 billion sperm, mostly when mating in the morning, when the sperm meets the ova the process of fertilization occurs.

The whole process of mating by the rooster and the hens just take a few seconds, following some rituals like when they are around the hen to mate with them they will form a circle around them with one wing dropped, they hold onto the neck feathers of the hen and lay on their back and then release the sperm when mated to oviduct the sperm.

Usually, a chicken rooster takes around 25 hours to complete the whole process and reach up to the infundibulum and then the fertilizing of eggs start which in total takes around three to seven days to become fertilized eggs.

The hens stay fertile for at least two weeks after being mated and the rooster does not mate with each female of the flock so accordingly the chickens' mate and hens can lay eggs which are also fertile for up to two weeks, the fertilized eggs are found only for 15 minutes after the chickens mate and lay eggs.

It is common for a hen to lay eggs after a certain age and then they keep laying eggs naturally, the male chicken should be involved in the whole mating process for the new-born chick as the sperm from the rooster is very helpful to make the unfertilized eggs as the fertilized eggs for the new chick and therefore it is said that the hen should mate before they lay eggs or else the eggs would be unfertilized.

Sometimes people get confused in differentiating a fertilized and an unfertilized egg, so you can find whether the eggs are fertilized or not within three days.

This you can do by seeing whether there is a ring in a circle form around the yolk, if there is a blastoderm on the egg yolk then it is defined as a fertilized egg.

The process of treading can cause several damages to the hen like skin damage, bald spots, and even feather damage.

There are times when the hens are also willing to mate and they show their desire by spreading their wings.

How does a male rooster fertilize an egg?

The role of a rooster in fertilizing an egg is they share the sperm with the hen to fertilize the eggs which in total take around three to seven days, and when the hen reaches the age at which they can lay eggs and after that, they can naturally lay eggs because they have reached that level of maturity it depends on the birth.

When they reach this age they can even lay eggs without mating but when the rooster mates with the hen it is basically called the cloaca kiss.

While doing so, they transfer the sperm into the hen's reproductive system which later on turns into fertilized eggs in which the male and female sex both are involved.

This is the main step in how the hen gets her eggs fertilized.

The embryo is a speck on the yolk which stops increasing after the eggs are refrigerated.

The coop needs to be cleaned after some days but not right after the process as sometimes the baby chick's feces gets dry and leaves a bad smell in the coop which is not tolerated by other chickens present there.

Usually, chickens do not produce fertilized eggs, but Anne Minard chickens, like other birds, lay already fertilized eggs through sexual reproduction so they do not require this much effort to transfer the sperm in the hen's oviduct to form newborn baby chicks.

If you are buying eggs from a fresh farm then you must check that whether you have purchased it from the smaller flock of these birds.

The sperm is first passed into the infundibulum which is a funnel-shaped organ and then the hens produce eggs. There should not be anybody damage or feather damage to the chicken before the production of fertile eggs.

Roosters play the main role in egg production as there should be at least one rooster in the flock who can mate with other hens and could increase their breeds in number and ensure that they are roosting at least once a week.

Rooster standing on one leg

How old does a rooster have to be to fertilize an egg?

The roosters mainly breed to perform the process of fertilization with the female chicken, but there is an age limit after which the rooster can take the responsibility of fertilizing eggs.

Roosters should be older than five months (about 20 weeks) because at this age they become mature and ready to mature a hen's egg, still, the hens are left with enough sperm to fertilize more eggs in the running week.

If both the sexes are willing to fertilize eggs to raise more chickens then only the rooster is needed after the hens have laid eggs and the baby chicks which hatch from the eggs are known as pullets.

You may find fresh eggs of this breed on the farm which are very healthy for a person.

The sperm exchange process takes place when the organ of the male chicken and female chicken like the cloaca or the vent comes in contact with each other the male chickens release the sperms that enters the female chicken's oviduct through the circular ring of the embryo.

You may see yolk which is present only in the fertilized egg that has a white ring around the embryo.

When they want to touch each other the female chicken tries to make body contact by lifting up the tail and the male chicken lowers the tail so the cloaca can come in contact and they can start mating if both are willing to do so.

The egg is covered with a strong shell and membrane so the baby chicks are protected before they hatch. The shell glands harden and then the eggs are ready to be laid by the female chicken.

The main reproductive organ in rooters is called the papilla and is situated inside the cloaca wall.

By what process do roosters fertilize an egg?

The one and only main process through which the male chicken or the roosters fertilize an egg is to share the sperm with a female hen.

They make use of several ways like touching the body parts, for example, the roosters lay on their back and touch the neck, vent, cloaca, and papilla, which is the main reproductive part of the roosters, through which they transfer sperms to the female chicken's oviduct.

It is important to mate the rooster and the hen before the hen starts laying eggs as they can still lay eggs.

The breeds of chickens are obviously different from other mammals as the male does not have a penis and females also do not have vaginas but the reproductive part in chickens is called papillae and the female part where they transfer the sperms is called the oviduct and later they fertilize the eggs.

The roosters are smart enough to mate with the females using different and unique techniques like the roster dance is the main and the process of their mating is called the cloaca kiss which results in passing sperms in the hen's reproductive system.

Hens can still lay eggs without a male when they reach that age of maturity and therefore you will find in many farms and shops that the shop keepers have only hens and still they sell good unfertilized eggs which are also healthy for eating.

Here at Kidadl, we have carefully created lots of interesting family-friendly facts for everyone to enjoy! If you liked our suggestions for how does a rooster fertilize an egg,then why not take a look at how is cotton candy made, or how is cheese made!

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Written by Chong Lhungdim

Bachelor's degree specializing in Economics, Master's degree specializing in Public Policy

Chong Lhungdim picture

Chong LhungdimBachelor's degree specializing in Economics, Master's degree specializing in Public Policy

With extensive knowledge in economics, public policy, and finance, Chong is a highly qualified professional with a Bachelor's degree in Economics St Andrew's College of Arts, Science and Commerce and a Postgraduate degree in Public Policy from the University of Mumbai. Her enthusiasm for research and content writing has led her to develop expertise in various fields of economic and public policy analysis. Chong has experience in research, data analysis, and producing high-quality content.

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