Final answer:
The irony of the Director of Hatcheries becoming a father lies in his role enforcing a societal norm that eschews natural reproduction, which he contradicts by becoming a biological parent himself.
Step-by-step explanation:
It is ironic that the Director of Hatcheries becomes a father because in Aldous Huxley's dystopian novel, Brave New World, the society is structured around the elimination of traditional reproduction and parenting. The Director oversees a system of artificial gestation called the Bokanovsky Process, creating humans in Hatcheries and Conditioning Centres.
This society values conformity and uniformity, with biological parenting considered obsolete and vulgar. Therefore, for the Director, a figurehead in perpetuating this societal framework, to engage in natural reproduction and become a father, is a betrayal of the very principles he upholds. It contradicts the societal norms and values he enforces, making his actions highly hypocritical and unexpected.