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close this bookBetter Farming Series 09 - Animal Husbandry: Animal Diseases; How Animals Reproduce (FAO - INADES, 1976, 33 p.)
close this folderReproduction
close this folderHow animals reproduce
View the document(introduction...)
Open this folder and view contentsThe reproductive systems
View the documentPregnancy and birth


We have studied how plants reproduce themselves (see Booklet No. 3, page 14).

We shall now study how animals reproduce.

It is very important to study this, in order to improve animal husbandry.

When you have a good knowledge of how animals give birth to their young, of how they reproduce, you can make a better choice of the animals for breeding.

To get a good harvest, a farmer chooses good seed (see Booklet No. 3, page 24).

To get good animals, a farmer chooses good breeding stock.

To get a good harvest, a farmer chooses good varieties of seed (see Booklet No. 3, page 22).

To get good animals, a farmer chooses good breeds.

To understand how animals reproduce, we must study the reproductive organs of the females and males.

The female

The reproductive organs of the female are all inside the animal.
You can see only the entry to the system which is called the vulva.

Genital organs of the cow

Genital organs removed from cow

Flowers have ovaries which contain ovules (see Booklet No. 3, page 11).
When the ovules are fertilized by pollen, the ovules become seeds.
Female animals have two ovaries which normally produce one or more ova. (In animals the female reproductive cell is called ovum, plural ova.)
If the female is covered (served) by the male at this time, the ovum is fertilized. It develops and becomes a young one in its mother's womb.

The male

This system consists of two testicles, which hang between the hind legs, the penis, and two ducts which connect the testicles with the penis.

Reproductive organs of the bull

Stamens give the pollen that fertilizes the ovule in a flower (see Booklet No. 3, page 14).
Testicles give the semen that fertilizes the ovum.
The fertilized ovum becomes a young one in its mother's womb.

Pregnancy and birth

When the female carries a young one in her womb, we say she is pregnant. Pregnancy begins with fertilization and ends with the birth of the young animal. It lasts a shorter or longer time depending on the kind of animal.

If the mother already has a young one, she must not feed it during the last stage of pregnancy, because the baby the female is carrying needs more food (see Booklet No. 8, page 21 ). The female cannot feed both the young animal already born and the one that is growing in her womb.

Some days before the birth, the udder of the mother swells.

At the time of birth, some of the membranes which cover the baby in the womb come out. These membranes contain water. Next, you see the legs come out, either the two forelegs or the two hind legs.

Sometimes you have to pull downward a little on the legs of the young animal so as to help the birth.

When the young animal has come out, if it is still joined to the mother by the umbilical cord: cut this and clean it carefully.

After the birth, the rest of the membranes come out. They must all come out. Otherwise they may rot inside the mother and cause her to die.

At birth the calf may come out in two ways

When the young animal is born the mother licks it with her tongue.
Let her do this.
At this time the mother is often thirsty. Give her water to drink.
During the first few days after the birth, the mother's milk is thick and yellow.
The young animal must drink this milk, which will clean its digestive tract.
Take great care of new- born animals. They are delicate. They easily catch parasites and diseases.
To protect them, have them vaccinated (see page 10).
Take good care of the young animals. feed them well and house them well. Otherwise they may die and you may lose a lot of money.