The effect of supplementation of follicle-stimulating hormone (FSH) into the Ovsynch protocol to increase the pregnancy rate in cyclic lactating dairy cows

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dc.authoridKarakaya-Bilen, Ebru/0000-0003-4837-1858
dc.authoridYimazbas Mecitoglu, Gulnaz/0000-0003-2817-3221
dc.authoridTasdemir, Umut/0000-0003-2827-1286
dc.contributor.authorYilmazbas-Mecitoglu, Gulnaz
dc.contributor.authorKeskin, Abdulkadir
dc.contributor.authorKarakaya-Bilen, Ebru
dc.contributor.authorTasdemir, Umut
dc.contributor.authorGumen, Ahmet
dc.date.accessioned2024-12-24T19:30:49Z
dc.date.available2024-12-24T19:30:49Z
dc.date.issued2022
dc.departmentSiirt Üniversitesi
dc.description.abstractThe aim of this study was to determine the effects of the follicle stimulating hormone (FSH) supplemented in the Ovsynch protocol on pregnancy per timed artificial insemination (P/TAI) in cyclic dairy cows. All cows (n = 383) included in the study received the Ovsynch protocol. The cows in FSH3 (n = 92), FSH4 (n = 88), and FSH3&4 (n = 91) were administered 20 mg FSH on day 3, or day 4, or both on days 3 and 4 of the protocol, respectively, whereas the control group (n = 112) did not receive any FSH treatment. The mean follicle number at TAI and ovulation number after TAI were similar among the FSH groups. However, the mean follicular size was smaller (similar to 14.9 mm, P = 0.02) in FSH4 compared to the other groups (similar to 15.9 mm). Pregnancy/TAI of the FSH4 group on day 31 (59.1%) and day 62 (53.4%) was higher than those of other groups on day 31 (45.5% in control, 45.7% in FSH3, and 46.2% in FSH3&4) and day 62 (42.9% in control, 43.5% in FSH3, and 40.7% in FSH3&4), but the difference was non-significant. Likewise, FSH4 (62.7%) had more (P = 0.05) P/TAI than the other groups (48.6% in control, 47.7% in FSH3, and 49.4% in FSH3&4) in synchronized cows. The cows which responded to the first gonadotropin-releasing hormone (GnRH) of Ovsynch in the FSH4 group (64.8%) had higher (P < 0.02) P/AI rate than the responding control cows (44.6%). We concluded that application of FSH on day 4 in cyclic cows which were responsive to the Ovsynch protocol can yield higher pregnancy rates, but more studies are needed to better demonstrate this potential effect.
dc.identifier.doi10.2754/avb202291020125
dc.identifier.endpage131
dc.identifier.issn0001-7213
dc.identifier.issn1801-7576
dc.identifier.issue2
dc.identifier.scopus2-s2.0-85129483160
dc.identifier.scopusqualityQ3
dc.identifier.startpage125
dc.identifier.urihttps://doi.org/10.2754/avb202291020125
dc.identifier.urihttps://hdl.handle.net/20.500.12604/7701
dc.identifier.volume91
dc.identifier.wosWOS:000791588500002
dc.identifier.wosqualityQ4
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherVeterinarni A Farmaceuticka Univerzita Brno
dc.relation.ispartofActa Veterinaria Brno
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/openAccess
dc.snmzKA_20241222
dc.subjectCattle
dc.subjectFSH
dc.subjectsynchronization
dc.subjectfertility
dc.titleThe effect of supplementation of follicle-stimulating hormone (FSH) into the Ovsynch protocol to increase the pregnancy rate in cyclic lactating dairy cows
dc.typeArticle

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