Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 4 of 4 for “"Lactation Length"”.
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Interaction of number of boar sperm and insemination timing on fertility following induced ovulation
… 641) were allotted by parity (average = 2.8) and lactation length (average = 19.5 d) to receive a single PCAI using 1.5 or 2.5 billion viable sperm at either 22, 26, or 30 h following OvuGel® administration at 96 h post-weaning. Sows received fence-line boar contact once daily 3 to 6 d following …
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Managing the lactating sow to stimulate lactation ovulation
In lactation, sows are typically anoestrus, with ovulation occurring three to seven days after weaning at approximately 24 days post-partum. Increasing piglet age to greater than 28 days improves piglet performance and welfare; however, it also results in reduced sow farrowing frequencies, making …
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Management of Length of Lactation and Dry Period to Increase Net Farm Income in a Simulated Dairy Herd
… to evaluate the economic impact of changing length of lactation relative to length of dry period in a dairy herd. It created weekly production for individual cows in a typical herd. Cows were dried off early if they were producing below a designated daily milk yield. They were replaced with …
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Melatonin administration during the follicular phase and early pregnancy to minimize seasonal infertility in swine
… parity 1 (P1) sows (n = 470) were assigned by lactation length and backfat to MEL or CON during similar reproductive phases. Data were analyzed for the main effects of treatment, season (4 wk periods) and their interaction. In Expt. 2a there was no effect of MEL on age at 3rd estrus (203 ± 1.3 …