When talking to his psychiatrist, a patient with schizophrenia said, "the pain in my head is the fusion of egg and sperm, but it only takes a father to make a baby, then the world ends." this is an example of a language disturbance called

The example of language disturbance in the question is called Word Salad. Word Salad is a confused or unintelligible mixture of seemingly random words and phrases which are not connected by context, it is a form of speech indicative of advanced schizophrenia.