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Human immature oocytes grow during culture for IVM
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Cavilla, J. L., Kennedy, C. Richard, Byskov, Anne Grete and Hartshorne, Geraldine M. (2008) Human immature oocytes grow during culture for IVM. Human Reproduction, Vol.23 (No.1). pp. 37-45. doi:10.1093/humrep/dem178
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Official URL: http://dx.doi.org/10.1093/humrep/dem178
Abstract
BACKGROUND: Oocyte competence for maturation and embryogenesis is associated with diameter in many mammals. We aimed to test whether this relationship exists in humans and to quantify its impact upon in vitro maturation (IVM). METHODS: We used computer-assisted image analysis daily to measure average diameter, zona thickness and other parameters in oocytes. Immature oocytes originated from unstimulated patients with polycystic ovaries, and from stimulated patients undergoing intracytoplasmic sperm injection (ICSI). Some were cultured with meiosis activating sterol (FF-MAS). Matured oocytes were inseminated using ICSI and embryo development was monitored. In vivo matured oocytes were also measured. RESULTS: Immature oocytes were smaller at collection than in viva matured oocytes. Maturation was related to oocyte diameter and many oocytes grew in culture. FF-MAS stimulated growth in oocytes derived from ICSI patients, but only stimulated growth in PCO derived oocytes if they matured in vitro. Degenerating oocytes showed cytoplasmic shrinkage. Neither zona thickness, perivitelline space, nor the total diameter of the oocyte plus zona were informative regarding maturation capacity. CONCLUSIONS: Immature oocytes grow during maturation culture. FF-MAS promotes oocyte growth in vitro. Oocytes from different sources have different growth profiles in vitro. Measuring oocytes in clinical IVM may provide additional non-invasive information that could potentially avoid the use of growing oocytes.
| Item Type: | Journal Article | ||||
|---|---|---|---|---|---|
| Subjects: | R Medicine > RG Gynecology and obstetrics | ||||
| Divisions: | Faculty of Medicine > Warwick Medical School > Biomedical Sciences > Translational & Experimental Medicine > Reproductive Health ( - until July 2016) Faculty of Medicine > Warwick Medical School |
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| Library of Congress Subject Headings (LCSH): | Human reproductive technology, Ovum, Oogenesis, Embryology | ||||
| Journal or Publication Title: | Human Reproduction | ||||
| Publisher: | OUP | ||||
| ISSN: | 0268-1161 | ||||
| Official Date: | January 2008 | ||||
| Dates: |
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| Volume: | Vol.23 | ||||
| Number: | No.1 | ||||
| Number of Pages: | 9 | ||||
| Page Range: | pp. 37-45 | ||||
| DOI: | 10.1093/humrep/dem178 | ||||
| Status: | Peer Reviewed | ||||
| Publication Status: | Published | ||||
| Access rights to Published version: | Restricted or Subscription Access |
Data sourced from Thomson Reuters' Web of Knowledge
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