Which hormones help to optimize piglet production?
2020
Wahner, M.
Sows are kept and piglet production nowadays generally according to the periodic group farrowing system with the use of artificial insemination. To this end, it is necessary to control the reproductive events in the sows. Their aim is to bring the sows in a group into heat almost at the same time so that they can be inseminated at the same time. This guarantees almost the same farrowing dates for the sows in a group. The most important measure in the sow group is at the end of the suckling period the date for the simultaneous weaning of the piglets from the sows. In order to support the synchronization of the reproductive processes in the sows in a group, the use of exogenous hormones in the respective cycle phases of the animals is recommended. In the article the hormones available for this (biotechnics) are presented with their effects. Reproductive hormones are differentiated according to their place of synthesis and their target organ. This includes the hypothalamus with the target organ pituitary gland (releasing hormone, GnRH), the anterior pituitary lobe with the gonads (gonadotropins, FSH, LH), the posterior pituitary lobe with the smooth muscles (oxytocin) and the sex steroids (prostaglandin) formed on the ovary (corpus luteum) call. As a tissue hormone, prostaglandin F2α is important with regard to its luteolytic effect. Finally, the environmentally relevant importance of hormone treatment in sows is discussed. Currently 10 to 15 percent of sows are treated with hormones. The scope of use of hormonal reproductive control in sows is decreasing.
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