Cortical granule complements in human oocytes undergoing partial zona dissection

Susan E. Lanzendorf, Ralph R. Kazer, Phillip E. Patton, Don P. Wolf

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


This study was performed to evaluate the effects of mechanical stimulation and sucrose treatment on the oocyte activation process. Fresh and aged human oocytes were exposed to sucrose and zonae were dissected with microneedles before fixation and quantitative analysis of cortical granules by transmission electron microscopy. Examination of the mean number of cortical granules/analyzed segment revealed no significant differences between control oocytes or oocytes treated with sucrose or sucrose treatment followed by zona dissection. A significant decline in the number of cortical granules/segment was observed for oocytes undergoing prolonged culture after dissection (P < 0.05). Thus, zona dissection and sucrose exposure of freshly aspirated mature human oocytes do not result in classical oocyte activation.

Original languageEnglish (US)
Pages (from-to)131-134
Number of pages4
JournalMolecular Reproduction and Development
Issue number2
StatePublished - Feb 1992


  • Activation
  • PZD
  • Sucrose treatment

ASJC Scopus subject areas

  • Genetics
  • Developmental Biology
  • Cell Biology


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