Conversation so far:
what does abp stand for in medical terms
Abbreviation for androgen binding protein.
what is androgen binding protein
a protein secreted by testicular Sertoli cells along with inhibin and müllerian inhibiting substance.
what are Sertoli cells
elongated cells in the seminiferous tubules that ensheathe spermatogenic cells, providing a microenvironment that supports spermiogenesis and spermatocytogenesis

Question: what does the last word mean
Self-contained rewrite: what does spermatocytogenesis mean