The patient, a 35-year-old male, has sought medical advice due to difficulties conceiving with his partner. Upon further investigation, the physician identifies abnormalities in spermatogenesis as the likely cause. Understanding the process of spermatogenesis is crucial in comprehending male infertility. At the end of spermatogenesis, each primary spermatocyte undergoes transformation. 

What is the ultimate outcome of this transformation in relation to the number of spermatids produced?