Yazar "Baran, Alper" seçeneğine göre listele

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  • Küçük Resim
    Öğe
    Induction of ovulation by GnRH and effects on fertility in the bitch
    (INDIAN VETERINARY JOURNAL, 2004) Baran, Alper; Evecen, Mithat; Alkan, Serhat; Ak, Kemal; Tek, Çağatay; Kaşıkcı, Güven; Ataman, MB
    The bitch has maximum two oestrous cycles a year and due to its long cycle and difficulty in determining ovulation time, there are difficulties in deciding the optimal insemination time. As a result of this, low litter size is seen in artificially inseminated bitches (Badinand et al., 1993; England, 1998). GnRH hormone is used in cattle, mare, rabbit and the other species to induce ovulation and enhance fertility. In the present study, determination of the optimal Insemination time and regulation of the long duration (24-72 hours) ovulations in a short time period by administering a GnRH preparation and their effects on pregnancy rates and litter sizes were investigated.
  • Küçük Resim Yok
    Öğe
    Kısraklarda östrüsün rektal muayene,ultrasonografi ve hızlı kan-progesteron testi yardımıyla belirlenmesi
    (1999) Ataman, M.Bozkurt; Baran, Alper; Günay, Ülgen; Günay, Aytekin; Seyrek-İntaş, Kamil; Uzman, Mehmet
    Bu çalışmada kısraklarda östrüsün; rektal palpasyon, ultrasonogra.fi ve hızlı kan-progesteron testi yardımıyla karşılaştırmalı olarak tespiti amaçlandı. Materyal olarak yaşları 5-15 arasında değişen saf ve yarım kan 20 İngiliz kısrak kullanıldı. Östrüs tespiti, deneme aygırı muayenesinden sonra rektal palpasyon ve ultrasonografi yardımıyla gerçekleştirildi. Follikül çapları östrüs boyunca rektal palpasyon ve ultrason kullanılarak östrüsün birinci gününden ovulasyon tespitine kadar gün aşırı ölçüldü. Follikül çapı ölçümlerini takiben kısraklardan gün aşırı olmak koşuluyla östrüsün birinci gününden ovulasyona kadar kan örnekleri alındı. Alınan örnekler 5000 devirde 20 dakika süreyle santrifüj edilerek serumlar elde edildi. Elde edilen serum iki eşit kısma ayrıldı. Birinci kısım serumda EIA (hızlı test), ikinci kısım serumda ise RIA yöntemine göre progesteron tayini yapıldı. Rektal palpasyon ve ııltrasonografık ölçümler arasındaki korelasyon (r0.92) önemli bulundu (p0.01). Serum progesteron düzeyleri EIA ile RIA yöntemi arasında % 85 oranında doğrulukta uyum gösterdi. Sonuç olarak, rektal palpasyon ve ultrasonografik muayeneler gibi hızlı kan progesteron testleriyle de östrüs tanısı yapılabileceği kanısına varıldı.
  • Küçük Resim
    Öğe
    Oestrous Synchronization With Progesterone Impregnated Device and Prostaglandin F-2 Alpha Both Combined With Human Chorionic Gonadotropin in Transitional Mares
    (Ecole National Vet Toulouse, 2000) Ataman, Mehmet Bozkurt; Günay, A.; Günay, U.; Baran, Alper; Uzman, M.
    The objective of this trial was to determine the efficacy of the progesterone removal inserted device (PRID) and PGF(2 alpha) analogue treatments combined with hCG administration on fertility in transitional mares. A total of forty-five thoroughbred mares were used in this experiment. Animals were divided into three groups. Progesterone-impregnated vaginal devices (PRID) were inserted into anterior vagina of the mares of the first group (n = 15). The devices were replaced on day 7 and removed on day 14. D-cloprostenol (0.075 mg) was intramuscularly injected two times at a 14-day interval in the second group (n = 15). Two milliliters of serum physiologic were intramuscularly injected two times at a 14-day interval in the third group (Control, n = 15). After injections and removal of progesterone-impregnated vaginal devices (PRID), the oestrous cycle of each mare was followed through teasing, palpation per rectum and transrectal ultrasonography. After the detection of oestrous, hCG (3000 IU) was intravenously injected to the mares of the first and second groups on the 4(th) day of oestrus. Follicles were monitored every 12 hours with ultrasonography until the ovulation occurred. Mares were mated naturally every other day beginning from 84 hours after detection of estrous until the end of estrous. Pregnant mares were determined with ultrasonography on day 20 after the last mating. There was a statistical significant difference (P < 0.05) between groups I and III and also II and III, for the oestrus, ovulation, pregnancy rates, ovulation time, oestrus duration and mating number required per conception, respectively. In conclusion, both progesterone impregnated device combined with human chorionic gonadotropin and PGF(2) combined with human chorionic gonadotropin applications were effective to induce oestrous and ovulation in transitional mares.