Effects of melatonin treatment on follicular development and oocyte quality in Chios ewes — Short communication
| Autor: | Eleni Dovolou, E. Vainas (Ε. Βαϊνασ), Georgios S. Amiridis, Fotini Samartzi, I. Valasi, Theodora Tsiligianni, Thomas Papanikolaou, V. Faigl, Sándor Cseh |
|---|---|
| Rok vydání: | 2009 |
| Předmět: |
medicine.medical_specialty
medicine.medical_treatment Population Fertilization in Vitro Biology Andrology Melatonin Ovarian Follicle Internal medicine Follicular phase medicine Animals education Fertilisation education.field_of_study Sheep In vitro fertilisation General Veterinary Embryo Oocyte In vitro maturation Endocrinology medicine.anatomical_structure Oocytes Female Estrus Synchronization medicine.drug |
| Zdroj: | Acta Veterinaria Hungarica. 57:331-335 |
| ISSN: | 1588-2705 0236-6290 |
| DOI: | 10.1556/avet.57.2009.2.13 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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