Lactational estrus induction in the Mexican hairless sow

Mota, Daniel Marques; Alonso-Spilsbury, M.; Mayagoitia, Lílian; Trujillo, María E.; Valencia, Javier; Ramírez-Necoechea, R.

doi:10.1016/s0378-4320(02)00073-8

Cited by 5 publications

(3 citation statements)

References 34 publications

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“…In sow Mota et al (2002), reported the role of vaginal exfoliative cytology in detection of oestrus along with 17-β oestradiol and progesterone assay.…”

Section: Vaginal Biopsymentioning

confidence: 99%

Vaginal Cytology: An Historical Perspective on its Diagnostic Use

Sharma¹,

Sharma²,

Dhama³

2016

Adv. Anim. Vet. Sci.

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| The knowledge of the reproductive physiology of estrus cycle is important for animal management and in order to determine the reproductive and productive potential of animals. The stage of the estrus cycle was predicted through the morphologic, endocrine and secretary changes occurring in the ovaries and the tubular genitalia during the estrous cycle, which had been associated with levels of steroid sex hormones. Vaginal cytology is a simple technique that can be used by practitioners to characterize stages of the reproductive cycle, disease conditions of genital tract and is a useful tool in determining optimum mating time (standing heat) in bitches. Many researchers studied the variations that occur in the vaginal mucosa at different phases of estrus cycle in bitch, sheep, goats, swine, cow etc. by using vaginal smears. The vaginal epithelial cells are classified into three cell types according to the differences in their sizes as a superficial squamous cells ( ferent progesterone and estrogen ratio and can be assessed through vaginal cytology. Moreover, when any inflammatory condition affects then genital tract undergoes characteristic change in vaginal cytology.

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“…In sow Mota et al (2002), reported the role of vaginal exfoliative cytology in detection of oestrus along with 17-β oestradiol and progesterone assay.…”

Section: Vaginal Biopsymentioning

confidence: 99%

Vaginal Cytology: An Historical Perspective on its Diagnostic Use

Sharma¹,

Sharma²,

Dhama³

2016

Adv. Anim. Vet. Sci.

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“…1998), seasonal shifts (Peltoniemi et al. 2000), boar contact (Mota et al. 2002) and factors that disturb the suckling process or the mother–infant relationship.…”

Section: Introductionmentioning

confidence: 99%

Ovarian Activity and Oestrous Signs among Group‐Housed, Lactating Sows: Influence of Behaviour, Environment and Production

Hultén¹,

Wallenbeck²,

Rydhmer³

2006

Reprod Domestic Animals

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ContentsAnimal welfare concerns require the development of housing systems that allow the animals to express their natural behaviour. One example of this is the group-housing system for lactating sows. The present study aimed at exploring ovarian activity in such a system. Thirty-eight sows farrowing individually outdoors during spring and summer, and indoors during autumn and winter, and group-housed in groups of four during weeks 3-7 of the lactation period, were monitored regarding reproductive functions, behaviour and production during their first to fourth lactation period. Average ovulation frequency during lactation was 47%. Only 50% of these ovulating cases were accompanied by a standing oestrus. Lactational ovulation frequency was higher in later parities (p < 0.001). Ovulation frequency was higher (p < 0.05) during winter (74%) and spring (69%), than during summer (10%) and autumn (23%). Occurrence of lactational ovulation was associated with some aspects of suckling behaviour and also with litter weight gain (p < 0.05). Forty-nine per cent of the lactational ovulations occurred during the seventh week of lactation. Timing of ovulation seemed positively (p ¼ 0.08) associated with weight loss during lactation. Compared with the sows that were anoestrus during lactation, oestradiol-17b values were higher (p < 0.05) only in the week before occurrence of lactational ovulation. Weaning-to-oestrous interval was prolonged (p < 0.05) among the sows that ovulated during lactation. The present study identifies several factors influencing ovarian activity among group-housed sows, thereby providing tools for the control of lactational ovulation in group-housing systems.

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“…Sows would occasionally push piglets out of their way (included in aggressive behaviours towards piglets, which occurred at a frequency per hour of 0.18 ± 0.05 towards offspring and 0.51 ± 0.11 towards non-offspring), but it was rarely observed that this resulted in a dangerous situation, such as a piglet being stepped on by a sow. Although the combination of boar contact and reduced contact with the piglets has previously been found effective to induce lactational oestrus (Mota et al, 2002;van Wettere et al, 2013), asynchronous or unpredictable onset of oestrus is a potential risk factor, and success of induction may depend on e.g. sow parity (Soede et al, 2012).…”

Section: A More Gradual Weaning Process During An Extended Lactationmentioning

confidence: 99%

Development of pigs raised in a group housing system for lactating sows and their litters

Nieuwamerongen¹

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Lactational estrus induction in the Mexican hairless sow

Cited by 5 publications

References 34 publications

Vaginal Cytology: An Historical Perspective on its Diagnostic Use

Vaginal Cytology: An Historical Perspective on its Diagnostic Use

Ovarian Activity and Oestrous Signs among Group‐Housed, Lactating Sows: Influence of Behaviour, Environment and Production

Development of pigs raised in a group housing system for lactating sows and their litters

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