Growth of the Reproductive Tract of the Gilt From Birth to Puberty

Dyck, G. W.; Swierstra, E. E.

doi:10.4141/cjas83-010

Cited by 45 publications

(31 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…During the first 70 days of life, uterine growth is slow [22] and the ovaries have no influence on uterine growth [23]. After this date, uterine growth begins and is associated with an increased oestrogen production.…”

Section: Discussionmentioning

confidence: 99%

Determination by echography of uterine changes around puberty in gilts and evaluationof a diagnosis of puberty

et al. 2003

View full text Add to dashboard Cite

-Three experiments were carried out to evaluate the use of ultrasonography in assessing the onset of puberty in gilts. In experiment 1, gilts (n = 17) were scanned 3 times per week beginning at 133 and continuing until 187 days of age. The ultrasonic appearance of the uterus was described, quantified and compared with the reproductive status observed at slaughter. The quantification of the pictures showed a different correlation in time for infantile, impubertal, prepubertal and pubertal stages. For pubertal females, "uterine area" increased at around 180 days of age, well-defined sections of the uterine horns appeared 3 ± 0.5 days before puberty. In infantile and impubertal gilts during the same period of age, uterine images remained dark and homogeneous; no significant change in the "uterine area" was observed. This difference in images allowed an evaluation of the diagnosis of puberty. In experiment 2, the gilts (n = 123) were scanned, the result was verified at slaughter the day after by examination of the genital tract. The uterine weight of the gilts that had reached a prepubertal or pubertal stage was significantly greater (P = 0.0001) than that in impubertal gilts. The sensitivity and the specificity of the diagnosis were 91.9% and 96.5% respectively. Experiment 3 was performed on a farm and echographic examinations were carried out one and five days after gilts (n = 117) arrived at the piggery. Oestrus detection or blood sampling for progesterone determinations were used as tools to determine the reproductive status. The sensitivity and the specificity of the diagnosis were 98.9% and 100% respectively. This diagnosis of puberty is thus accurate.pig / puberty / detection / ultrasonography * Corresponding author: fbotte@tours.inra.fr Reprod. Nutr. Dev. 43 (2003) 225-236 225

show abstract

Section: Discussionmentioning

confidence: 99%

Determination by echography of uterine changes around puberty in gilts and evaluationof a diagnosis of puberty

et al. 2003

View full text Add to dashboard Cite

show abstract

“…Growth of the porcine uterus and development of the porcine uterine wall between birth and puberty have been characterized grossly (Wu and Dziuk, 1988;Dyck and Swierstra, 1983;Dyck, 1980) and histologically (Dyck and Swierstra, 1983;Erices and Schnurrbusch, 1979;Bal and Getty, 1970;Hadek and Getty, 1959). Transformation of the porcine uterine wall from structural infancy to histoarchitectural maturity occurs during the first 120 days after birth (Dyck and Swierstra, 1983;Dyck, 1980;Erices and Schnurrbusch, 1979;Bal and Getty, 1970;Hadek and Getty, 1959).…”

Section: Introductionmentioning

confidence: 99%

“…Transformation of the porcine uterine wall from structural infancy to histoarchitectural maturity occurs during the first 120 days after birth (Dyck and Swierstra, 1983;Dyck, 1980;Erices and Schnurrbusch, 1979;Bal and Getty, 1970;Hadek and Getty, 1959). Uterine morphogenetic events characteristic of the first 8 weeks of life are dramatic and include appearance and proliferation of uterine glands, development of endometrial folds, and both differentiation and development of myometrial smooth muscle layers (Dyck and Swier- binding was observed on all days, whereas stromal ConA staining decreased in intensity from moderate to weak after Day 14.…”

Section: Introductionmentioning

confidence: 99%

Lectin binding sites as markers of neonatal porcine uterine development.

Spencer

Wiley²,

Bartol³

1992

J Histochem Cytochem.

View full text Add to dashboard Cite

To identify lectin binding sites and to determine if lectin binding patterns change with age in developing neonatal porcine uterine tissues, gilts (n = 3/day) were hysterectomized on Day 0 (birth), 7, 14,28,42, or 56. Lectin binding was visualized in Bouin's-fued utetine tissues with seven biotinylated lectins (ConA, DBA, PNA, RCA-I, SBA, UEA-I, and WGA) and avidin-peroxidase staining procedures. Leain specificities were demonstrated by pre-incubating lectins with appropriate inhibitory sugars (0.2 M). Staining intensity was evaluated visually (absent, weak, moderate, or strong) for three endometrial tissues; luminal epithelium, glandular epithelium, and stroma. Staining intensities for DBA, PNA, SBA, and WGA were not affected by neonatal age. Staining with these lectins was greater in uterine epithelium (moderate or strong) than in stroma (weak). In contrast, binding patterns for ConA, UEA-I, and RCA-I were affected by neonatal age. Strong epithelial staining associated with ConA

show abstract

“…ks tentatives pour provoquer la pubert6 d I'aide d'injections d'hormones ir un dge moins avanc6 n'ont pas 6t6 fructueuses ir cause de la variabilit6 de I'dge a maturitd sexuelle. ks recherches sur les nombreuses facettes de la gestation ont entrain6 la mise au point de m6thodes d'alimentation et de gestion de I'accouplement de fagon i maximiser les taux d'ovulation, de (Casida 1935;Hadek and Getty 1959a, b; Fulka etat.7972; Erices and Schnurrbusch 1979;Oxender etal.1979;Hughes andVarley 1980;Elsaesser 1982;Dyck and Swierstra 1983;Camous et al 1985). Several aspects of this developmental process are shown in Fig.…”

unclassified

Growth of the Reproductive Tract of the Gilt From Birth to Puberty

Cited by 45 publications

References 1 publication

Determination by echography of uterine changes around puberty in gilts and evaluationof a diagnosis of puberty

Determination by echography of uterine changes around puberty in gilts and evaluationof a diagnosis of puberty

Lectin binding sites as markers of neonatal porcine uterine development.

Factors Influencing Sexual Maturation, Puberty and Reproductive Efficiency in the Gilt

Contact Info

Product

Resources

About