Effect of age and number of parturitions on uterine and ovarian variables in owl monkeys

Abstract

The uterine volume (UV) was directly proportional to the number of parturitions, which was the most important factor in the uterine growth of adult females (P < 0.05). The body weight and age of the animals showed a high positive correlation with UV (r = 0.5354, r = 0.6489, P < 0.01), respectively. The volume of the ovaries grew in proportion to the age of the females (P < 0.05). Puberty was the period of greatest uterine and ovarian growth.

Functional morphology of the tubular genital organs in the female owl monkey (Aotus spp.)

“…The results related to uterine evaluation in this study are very similar to those reported in previous studies performed with ultrasound in A. azarai infulatus . The simplex non‐pregnant uterus was characterized by a globular fundic portion and a small cervix that protruded into the vaginal canal, which is similar to other New World primate species , but different from apes, which have the fundic portion described as flattened .…”

“…According to ultrasound data of Coutinho et al. , after the first pregnancy the uterus enlarges, probably as a result of hormonal events and their influence on uterine development on size and weight . This enlargement after first pregnancy does not allow us to observe further variations in the uterine biometry related to the estrous cycle.…”

“…However, normal uterine tubes cannot be evaluated by ultrasound. A comparison of uterine biometry through morphological and ultrasonographic studies has been useful to validate uterine evaluations by ultrasound in Aotus spp. Previous ultrasound studies in A. a. infulatus demonstrated that the number of parturitions is an important factor affecting uterine variables, particularly to determine the uterine volume .…”

“…This contrast with our findings may be explained by different techniques or subspecies differences. Unfortunately, the cervix is not well visualized by ultrasound in owl monkeys , due to its anatomical location and limitation for a transvaginal exam.…”

<b>Detecção e quantificação do vírus da hepatite E (HEV) por RT-PCR em tempo real e estudo experimental em primatas neotropicais (<i>Aotus azarai infulatus</i>) infectados pelo genótipo 3 do HEV</b>

“…A espécie Aotus azarai infulatus é comumente utilizada como modelo em pesquisas biomédicas no Centro Nacional de Primatas (CENP/SVS/MS) (MONTEIRO et al, 2009;COUTINHO et al, 2011;TAKESHITA et al, 2011;LINS et al, 2012;MAYOR et al, 2015) e a utilização da espécie no presente estudo foi baseada no registro prévio da susceptibilidade de infecção por isolado humano do genótipo 2 do HEV em macacos-da-noite da espécie A.…”