泌乳期、断奶后及乏情初产母猪的卵泡发育
Follicular development in lactating, post weaning and anoestrous primiparous sows.
作者信息
Rojanasthien S, Einarsson S, Settergren I
出版信息
Acta Vet Scand. 1987;28(3-4):421-7. doi: 10.1186/BF03548610.
The ovarian follicular system was studied in 4 lactating sows (6 or 8 weeks lactation period), 4 post weaning sows (2 or 4 days after weaning) and 5 post weaning anoestrous sows (22 days after weaning) by macroscopical and microscopical examinations. Blood sampling was performed daily in the post weaning anoestrous sows. The results showed that none of the sows had ovulated during lactation and after weaning. Only small and medium sized follicles were present in the ovaries of the sows. The blood levels of oestradiol-17β and progesterone were low throughout the post weaning period in the anoestrous sows. Microscopical examination showed that all sows had more normal than atretic follicles. In the lactating sows all follicles were below 5 mm in size, the majority being small (1.00–2.99 mm in diameter). The post weaning sows had follicles up to 5.00–5.99 mm and 23–24% of the follicles were medium sized (3.00–5.99 mm in diameter). The post weaning anoestrous sows had no follicles above 5 mm in diameter but many normal medium sized follicles.
通过宏观和微观检查，对4头哺乳期母猪（哺乳期为6或8周）、4头断奶后母猪（断奶后2或4天）和5头断奶后乏情母猪（断奶后22天）的卵巢卵泡系统进行了研究。对断奶后乏情母猪每天进行采血。结果表明，所有母猪在哺乳期和断奶后均未排卵。母猪卵巢中仅存在中小卵泡。断奶后乏情母猪在整个断奶后时期，雌二醇-17β和孕酮的血液水平均较低。微观检查显示，所有母猪的正常卵泡均多于闭锁卵泡。哺乳期母猪的所有卵泡大小均在5毫米以下，大多数为小卵泡（直径1.00 - 2.99毫米）。断奶后母猪的卵泡大小可达5.00 - 5.99毫米，其中23 - 24%为中等大小卵泡（直径3.00 - 5.99毫米）。断奶后乏情母猪没有直径大于5毫米的卵泡，但有许多正常的中等大小卵泡。
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