Parent cell of a spermatid, derived by mitotic division from a spermatogonium.
Note: The primary spermatocyte gives rise to a pair of
haploid secondary spermatocytes by meiosis.
Source:
PAC, 2016, 88, 713. 'Glossary of terms used in developmental and reproductive toxicology (IUPAC Recommendations 2016)' on page 807 (https://doi.org/10.1515/pac-2015-1202)