Assessing the reproductive health of animals

Assessing the reproductive health of animals
A Japanese Black Tajima beef sire produced in Hyogo Prefecture (world-renowned Kobe beef is produced from Tajima beef cattle). The review highlights INSL3 as a promising indicator for reproductive function in domestic male animals. This may facilitate earlier selection of valuable sires, such as Tajima beef bulls, with higher reproductive performance, contributing to reductions in the labor and costs required for sire selection. Credit: Osaka Metropolitan University and Hyogo Prefecture

Animal breeding is an interest shared by farm owners and pet lovers, yet how to simply assess animals' reproductive functions remains a question. An Osaka Metropolitan University researcher provides a potential answer with his review on insulin-like peptide 3 (INSL3)—a circulating hormone secreted from the gonads—that highlights this hormone as a promising fertility indicator in domestic animals.

These review results might facilitate early selection of fertile males or sires, reducing the costs and labor required for sire selection. His review was published in Reproductive Medicine and Biology.

While several review papers on INSL3 have been made for experimental animals such as mice, rats, and also for humans, no review papers have been published on such as farm and .

Addressing this gap, Professor Noritoshi Kawate from the Graduate School of Veterinary Science at Osaka Metropolitan University reviewed a wide range of studies on the structure, expression, and reproductive roles of INSL3, as well as its circulation in domestic animals with normal and abnormal reproductive conditions. These findings were further compared with existing data for rodents and humans.

His review includes results from his own research team, which has been examining INSL3 in farm and companion animals since 2010. The team has developed the world's first immunoassay for quantifying INSL3 in the blood of many animal species, including cattle, goats, pigs, horses, and dogs, among others, in order to analyze the secretion dynamics of INSL3 in domestic animals.

The review results show that, in contrast to what happens in humans, INSL3 secretions in bulls and male goats are immediately stimulated by the pulsatile release of luteinizing hormone from the pituitary gland. Additionally, the extent of the increase in INSL3 caused by the luteinizing hormone pulses is smaller than that of testosterone, a conventional and well-known testicular , suggesting that INSL3 offers more reliable and stable values by a single blood collection.

Furthermore, it is found that in Japanese Black beef bulls with poor semen and dogs with bilateral cryptorchidism, blood INSL3 levels are lower than those in normal animals.

"These review findings about INSL3 are expected to simplify reproductive function assessment in various male animals," stated Professor Kawate. "In particular, the assay method may facilitate earlier selection of valuable male animals such as beef sire bulls with higher reproductive performance, reducing both expense and labor before their selection. Blood INSL3 levels in female animals, on the other hand, are much lower than those in male animals, making them difficult to measure. To address this, we will continue our research to improve the measurement method."

More information: Noritoshi Kawate, Insulin‐like peptide 3 in domestic animals with normal and abnormal reproductive functions, in comparison to rodents and humans, Reproductive Medicine and Biology (2022). DOI: 10.1002/rmb2.12485

Provided by Osaka Metropolitan University

Citation: Assessing the reproductive health of animals (2022, October 21) retrieved 28 March 2023 from
This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only.

Explore further

Hormone discovery marks breakthough in understanding fertility


Feedback to editors