Conditioning is reinforced through hypnopedia (sleep training).
The society in Brave New World they condition their infants to not only accept their status in society, but love their status also. After the egg has become an embryo, the Bokanovsky's Process of separating the embryo into eight to ninety-six of the exact same embryo.
The process affects the mental ability of the adult when the embryo develops. The Bokanovsky's Process of division was only used for Gammas, Epsilons, and Deltas as the Alphas and Betas mental ability had to be high. In the stage where, the embryos become foetuses and the foetuses become babies, many things are used to affect the growing babies. Those who become Gammas or Deltas or Epsilons, are given less oxygen when they grow, making them have low mental abilities. Also those who are meant to work in a specific area with a certain job are exposed to that area more often so they become suited to it and do not want to work anywhere also. As they would be happy working in that job. Also the growing babies are given immunities while growing. So they do not contract diseases while growing up.
Finally when the babies are born and growing up, more conditioning is applied. They are conditioned to like or dislikes things through pain, an example from is that, the people would shock the babies with painful electric shocks, when they are around flowers, so they will hate nature. This has to be applied more times than once before the babies will truly hate nature. The last step of conditioning is when the children are asleep. They condition the children with hypnopedia. Quotes that show this are, "Alpha children wear grey. They work much harder than we do, because they're so frightfully clever. I'm really awfully glad I'm a Beta, because I don't work so hard. And then we are much better than the Gammas and Deltas. Gammas are stupid. They all wear green, and Delta children wear khaki. Oh no, I don't want to play with Delta children. And Epsilons are still worse. They're too stupid to be able …" "Till at last the child's mind is these suggestions, and the sum of the suggestions is the child's mind. And not the child's mind only. The adult's mind too-all his life long. The mind that judges and desires and decides-made up of these suggestions. But all these suggestions are our suggestions! "
