What is the pronucleus?

The initial step of spermatogenesis is the transition from male primitive germ cells (gonocytes) to undifferentiated spermatogonia in the neonatal testis. Germ cells are forever. Cell. 2008 Feb 22;132(4):559-62. doi: 10.1016/j.cell.2008.02.003. Jan 8, 2004 ... We show that embryoid bodies support maturation of the primordial germ cells into haploid male gametes, which when injected into oocytes restore ... Growths that develop in egg cells are called ovarian germ cell tumors. These tumors may be benign (noncancerous) or malignant (cancerous). 14th biennial meeting on Germ Cells to be held at Cold Spring Harbor Laboratory, Long Island, New York. Oct 31, 2022 ... "Not many people truly appreciate the crazy mystery of how germ cells have lasted 1.5 billion years," Whitehead Institute Member Yukiko Yamashita says. CNS germ cell tumors typically form near the pineal gland or the pituitary gland, though they can form in other parts of the brain. The symptoms they produce ... Testicular cancers start in germ cells. These are cells in the testicles that make sperm. These tumors often start in the testicles. Extragonadal germ cell tumors have a variable clinical course, with the potential for aggressive behavior and widespread metastases. The imaging characteristics ... Dec 3, 2021 ... Extragonadal germ cell tumors form from developing sperm or egg cells that travel from the gonads to other parts of the body. Age and gender can ...