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Reproduction represents a key point in the maintenance of the pig sector in terms of production and contributes to the establishment of high levels of swine health. Therefore, it is essential to provide valuable tools to veterinarians about the main challenges related to this topic in order to minimise the impact caused by the most important disorders/diseases at reproductive level. This handbook, written by a renowned specialist in this field, has been developed through a visual and practical approach, using numerous figures that illustrate the ovarian pathophysiology of the sow, and providing the suitable content to the veterinarians so as to tackle this matter successfully.
1. Reproductive cycle
Reproductive system: parts and functions
Gonads: ovaries
Tubular part
Copulatory part
Mammary glands
Hypothalamic-pituitary-ovarian axis and reproductive hormones
Factors that influence reproduction
External factors
Internal factors
Puberty
Reproductive ability
What are the characteristics of their reproductive cycle?
Follicular dynamics
Structures present in the ovary during
the reproductive cycle
Antral follicles
Corpora lutea
Corpora albicans
Hormonal profile
Follicular phase
Control of oogenesis and folliculogenesis
Endocrine control
Chronology of folliculogenesis in mature sows
Follicle recruitment: end of dioestrus or weaning in end of lactation period
Follicle selection: pro-oestrus
Follicle dominance: oestrus
Importance of oestrogens: heat
Practical application on the farm:
how is ideal heat detection?
What induces the preovulatory LH peak in the follicle?
Duration of oestrus and time of ovulation
Practical application on the farm:
time of service/insemination
Luteal phase
Early dioestrus
Late dioestrus/gestation
Corpora lutea in the reproductive cycle and gestation
Ovulation rate
Importance of P4
Practical application on the farm: use of progestogens to synchronise heat in cycling sows
Luteolysis
Practical application on the farm: induction of luteolysis with PG
2. Anoestrus and reproductive seasonality
Anoestrus and pseudoanoestrus
Summer anoestrus
Hormone levels
How can a problem of anoestrus be
diagnosed on a farm?
Differentiation between anoestrus and pseudoanoestrus
Ovarian ultrasound scan and P4 determination
Postmortem study of the ovaries
Heat induction with gonadotropins
Prevention of anoestrus
3. Identification of diseased ovaries
Reproductive consequences of abnormal ovarian function
Congenital alterations
Intersexuality
Paraovarian cysts
Acquired alterations
Cystic ovarian degeneration
Ovarian neoplasms
4. References
5. Glossary of abbreviations
- Autor/es María Victoria Falceto Recio
- Fecha de edición abril 2016
- Nº Páginas 82
- Encuadernación Tapa blanda. Wire-o
- Tamaño 17 X 11
- Idioma Inglés