The Morphological Changes of Uterus in Postnatal Development of Heifers

Reproduction Full-length research article Influence of age and weight of Girolando heifers on uterine and ovarian development ABSTRACT-The present study aimed to correlate the age and weight of Girolando heifers with uterine and ovarian development. Sixty heifers between 12 and 36 months old were weighed and subjected to ultrasound assessment to measure the diameters of each uterine horn and ovaries, monthly. These measures continued until their first ovulation. The animals were divided, for data analysis, according to their age into five groups: GI (12 to 14 months), GII (15 to 18 months), GIII (19 to 24 months), GIV (25 to 30 months), and GV (31 to 36 months). The dispersion diagram was used to assess the correlation between data collected monthly from uterus/ovaries and weight/age. An average daily growth of 0.0032 mm was recorded for the right ovary (RO) and 0.0051 mm for the left ovary (LO). The average size of the RO in GI was 17.58 mm and the LO was 15.28 mm; in GII, the RO was 16.72 mm and the LO was 15.89 mm; in GIII, the RO was 18.37 mm and the LO was 16.55 mm; in GIV, the RO was 19.09 mm and the LO was 17.49 mm; and in GV, the RO was 19.89 mm and the LO was 18.96 mm. The uterine horns showed an average daily growth of 0.0064 mm and 0.0071 mm for the right (RU) and left (LU) uterine horn, respectively. The average sizes of the uterine horns per group were:

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Influence of age and weight of Girolando heifers on uterine and ovarian development

Fernandez

Freitas

Grillo

et al. 2020

Revista Brasileira De Zootecnia

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The Morphological Changes of Uterus in Postnatal Development of Heifers

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Influence of age and weight of Girolando heifers on uterine and ovarian development

Influence of age and weight of Girolando heifers on uterine and ovarian development

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