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Developmental competence of prepubertal and adult goat oocytes cultured in semi-defined media following laparoscopic recovery

With an increased interest in transgenic animal production, the caprine species offers many advantages, and the prepubertal goat is a potential source of large numbers of oocytes for in vitro embryo production. The aim of the present study was to evaluate the follicular response and recovery of oocy...

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Bibliographic Details
Published in:Theriogenology 2003-09, Vol.60 (5), p.879-889
Main Authors: Koeman, Jennifer, Keefer, Carol L., Baldassarre, Hernan, Downey, Bruce R.
Format: Article
Language:English
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Summary:With an increased interest in transgenic animal production, the caprine species offers many advantages, and the prepubertal goat is a potential source of large numbers of oocytes for in vitro embryo production. The aim of the present study was to evaluate the follicular response and recovery of oocytes from prepubertal and adult goats following ovarian stimulation and laparoscopic recovery, and their developmental competence following culture in semi-defined media. Oocytes were collected over a 15-week period from prepubertal goats (3–7 months old) and adult controls (2–4 years old) that had been subjected to estrus synchronization and ovarian stimulation. Following insemination, zygotes were cultured for 96 h in G1.2 followed by an additional 120 h in G2.2. Morulae and blastocysts were scored using light microscopy on Days 7 and 9 followed by fluorescent staining for cell counts on Day 9 (216 h postinsemination). The mean numbers of follicles aspirated and oocytes recovered were significantly greater for prepubertal than for adult goats ( P
ISSN:0093-691X
1879-3231
DOI:10.1016/S0093-691X(03)00090-6