Freezing, thawing, and autograft of ovarian fragments in sheep: preliminary experiments and histologic assessment.
Fertil Steril 1998;
70:124-8. [PMID:
9660433 DOI:
10.1016/s0015-0282(98)00095-8]
[Citation(s) in RCA: 37] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
OBJECTIVE
To evaluate the effects of freezing and thawing on the histologic changes in ovarian fragments from sheep and to determine the feasibility of ovarian autografts.
DESIGN
Histologic evaluation of follicles that survived after freezing at -196 degrees C for 2 weeks. Histologic evaluation of ovarian fragments 6 months after the autografts.
SETTING
Laboratoire de Zootechnie, Ecole National Véterinaire, Marcy l'Etoile, France.
ANIMAL(S)
Six ewes aged 6 months to 1 year.
INTERVENTION(S)
Cortical fragments were prepared from the right ovary of 6 lambs and were grafted immediately to the contralateral ovarian hilus or were cooled slowly to -196 degrees C in medium containing dimethyl sulfoxide for 2 weeks. The autografts were recovered 6 months later.
RESULT(S)
Histologic examination of ovarian slices after freezing showed no destruction of primordial, primary, secondary, or cavitary follicles. The ovarian autograft showed good recovery of the macroscopic and microscopic ovarian structure. After autografting, histologic examination revealed primordial to cavitary follicles.
CONCLUSION(S)
Freezing of ovarian fragments is possible without damaging the follicles. Ovarian autografts showed good recovery of ovarian structure.
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