In Brave New World, human beings are cloned using the Bokanovsky Process, thereby eliminating the need for men and women to reproduce through sexual intercourse.
According to chapter one, this process of cloning is broken down into six steps.
Firstly, the eggs are put under an x-ray for eight minutes. Note that not all eggs survive this process.
Secondly, the surviving eggs are returned to the incubators. This enables the buds to develop.
Thirdly, after two days in the incubator, the eggs are "suddenly chilled" by being exposed to a much cooler temperature.
Fourthly, the buds are checked to see how they coped with the chilling. They are then chilled for a second time.
Fifthly, the buds are covered in alcohol. By this point, the buds have undergone significant transformation, with each having budded as many as eight times.
Finally, the buds are left alone to continue with their development.
This process is, therefore, very different from the natural process of reproduction, but it is vital to maintaining the social order and cohesion that this society has created.