Puberty in Zebu heifers follows a pattern characterized by a decrease in the steroid
feedback mechanism and an increase in LH concentration, which result in the first ovulation …

Fertility is a complex trait in beef production systems and genetic evaluation procedures,
which is partly due to the numerous measures used to assess reproduction. Beyond beef …

Age at puberty in beef heifers can influence economic efficiency of beef production through
effects on both age at first calving (2 vs. 3+ years of age) and the time of conception of …

In the current review the main fundamental biological differences in reproductive function
between Bos taurus and Bos indicus cattle are discussed. Breed differences regarding …

Background Given the economic relevance of fertility and reproductive traits for the beef
cattle industry, investigating their genetic background and developing effective breeding …

Simple Summary Tropical pasture-based beef production systems play a vital role in global
food security. The importance of promoting sustainable intensification of such systems has …

Nelore heifers usually begin their reproductive life at⩾ 24 months of age mainly due to
suboptimal nutritional conditions and genetics. This study aimed to determine the effect of …

To estimate heritability (h2) for yearling heifer pregnancy and to estimate the genetic
correlation between heifer pregnancy and scrotal circumference, 18,145 records of Nellore …

Scrotal circumference data from 47,605 Nellore young bulls, measured at around 18 mo of
age (SC18), were analyzed simultaneously with 27,924 heifer pregnancy (HP) and 80,831 …

Mitochondrial DNA copy number is strictly regulated during development as naive cells
differentiate into mature cells to ensure that specific cell types have sufficient copies of …