Effects of melatonin treatment on follicular development and oocyte quality in Chios ewes — Short communication

Effects of melatonin treatment on follicular development and oocyte quality in Chios ewes — Short communication

Follicular development and oocyte quality were assessed by laparoscopic observation and in vitro fertilisation, respectively, in melatonin-treated (Group M) and control (Group C) anoestrous Chios ewes (n = 10 in each group). Fourteen days after melatonin insertion, all ewes had laparoscopic evaluati...

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Published in:Acta veterinaria Hungarica (Budapest. 1983) Vol. 57; no. 2; pp. 331 - 335
Main Authors: Tsiligianni, Theodora, Valasi, Irene, Cseh, Sándor, Vainas, Emmanuel, Faigl, Vera, Samartzi, Fotini, Papanikolaou, Thomas, Dovolou, Eleni, Amiridis, Georgios S
Format: Journal Article
Language:English
Published: Hungary Akadémiai Kiadó 01-06-2009
Subjects:
Animals
Estrus Synchronization
Female
Fertilization in Vitro
Melatonin - pharmacology
Oocytes - drug effects
Ovarian Follicle - drug effects
Sheep
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Summary:Follicular development and oocyte quality were assessed by laparoscopic observation and in vitro fertilisation, respectively, in melatonin-treated (Group M) and control (Group C) anoestrous Chios ewes (n = 10 in each group). Fourteen days after melatonin insertion, all ewes had laparoscopic evaluation of the follicular population followed by oocyte pick-up (OPU); on day 22 intravaginal progestagen sponges were inserted for 14 days. Two days after sponge removal the follicular population was re-evaluated and a second follicular aspiration was performed. Collected oocytes from the second OPU underwent in vitro maturation, fertilisation and culture. The number of large follicles was higher in Group M than in the control ewes during the first OPU and tended to be so (P = 0.06) at the second. Morphologically, oocytes collected from controls were of better quality than those from Group M; however, more oocytes collected from melatonintreated animals fertilised and developed in vitro . These results indicate that melatonin is a potent regulator of follicular development and oocyte competence during the anoestrous period of the ewe.
Bibliography:http://dx.doi.org/10.1556%2FAVet.57.2009.2.13
ObjectType-Article-1
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ISSN:0236-6290
1588-2705
DOI:10.1556/avet.57.2009.2.13