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Effect of dose and duration of FSH treatment on ovarian response in prepubertal calves.
Animal Reproduction Science ( IF 2.2 ) Pub Date : 2020-04-24 , DOI: 10.1016/j.anireprosci.2020.106471
Ana Rita T Krause 1 , Fernanda C F Dias 1 , Gregg P Adams 1 , Reuben J Mapletoft 2 , Jaswant Singh 1
Affiliation  

The objective of the study was to determine relative effects of dose (200 or 350 mg) and duration (4 or 7 days) of superstimulatory treatment on the ovarian response in prepubertal calves. Calves with similar antral follicular counts at wave emergence (n = 24) were given eight doses of either 25 or 44 mg pFSH every 12 h for 4 days or 14 doses of either 14 or 25 mg pFSH for 7 days beginning at the time of follicular wave emergence and 12.5 mg of pLH im 12 h after the last FSH treatment. On Day 4 of pFSH treatment, calves given 14 mg had fewer follicles ≥3 mm than those given 25 mg (15.1 ± 1.9 and 27.9 ± 3.3, respectively; P = 0.04). At the end of treatment (24 h post-LH), number of follicles ≥9 mm was greater in calves of groups treated with 350 than 200 mg (13.5 ± 1.8 and 8.8 ± 1.3, respectively; P = 0.02) and calves of groups treated for 7 than 4 days (13.3 ± 1.8 and 9.0 ± 1.3, respectively; P = 0.03). The number of spontaneous ovulations was greater in calves of groups treated for 7 than 4 days as was the total number of ovulations (9.7 ± 0.9 and 6.9 ± 1.0, respectively; P ≤ 0.05). In summary, a dose of 25 mg of pFSH per treatment given twice daily for 7 days resulted in a greater ovarian response than other superstimulatory treatments in prepubertal calves.



中文翻译:

FSH治疗的剂量和持续时间对青春期前犊牛卵巢反应的影响。

该研究的目的是确定剂量(200或350 mg)和超刺激治疗持续时间(4或7天)对青春期前犊牛卵巢反应的相对影响。从出现卵泡开始(n  = 24),每12小时给八剂剂量分别为25或44 mg pFSH的小牛出没(n = 24),共4天,或从卵泡开始起每7天给予14剂14或25 mg pFSH的小儿在最后一次FSH治疗后12小时内出现电波和12.5 mg pLH。在pFSH治疗的第4天,给予14 mg的小牛的≥3mm卵泡比给予25 mg的小(分别为15.1±1.9和27.9±3.3;P= 0.04)。在治疗结束时(LH后24小时),接受350组治疗的小牛的卵泡数量≥9mm大于200 mg(分别为13.5±1.8和8.8±1.3;P = 0.02)和各组的小牛治疗7天比4天(分别为13.3±1.8和9.0±1.3;P = 0.03)。自发排卵的数量在7超过4天治疗组的小牛了较大的作为是排卵的总数(分别为9.7±0.9和6.9±1.0; P ≤0.05)。总之,与青春期前犊牛的其他超刺激治疗相比,每天两次给予25 mg pFSH,共7天,可产生更大的卵巢反应。

更新日期:2020-06-27
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