Profitability of sows is dependent on specific things, such as:
a) Proper farrowing management: colostrum intake, specific plan of cross fostering and action with nurse sows.
b) Some environmental conditions within its thermoneutrality.
c) Diet adapted to your needs in each production phase.
d) Biosecurity and health prevention programs that will give us the best health status.
The physiological processes that chronologically take place during the reproductive cycle of a sow, as well as the main symptoms that we observe in practice, are:
a) Fertilization phase: takes place in the first hours after insemination and conditioned to the half-life of the oocytes (6-8 hours) and the sperm (20-24 hours in the female genital tract).
b) Implantation phase: occurs 12-14 days after insemination, at which time the sow recognizes its gestation. Resorptions prior to this period give rise to cyclic repetitions, usually of a noninfectious component.
c) Fetal ossification phase: occurs between 30-35 days of gestation. Fetal death from this moment forward is not resolved with a reabsorption, but with a mummification.
d) Immunotolerance phase: occurs between 60-70 days of gestation, from which time the fetus can be infected and be born viremic.
e) Immunocompetence phase: after 70 days of gestation the immune system of the fetus can fight any disease, which does not necessarily mean that it is capable of overcoming it.
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