In order to determine whether seasonal variations may influence the estrous cycle length
(ECL), corpus luteum size (CLS), maximum area of CL (MACL), day of cycle with maximum …

Sustainability of dairy production depends largely on reproductive efficiency that is affected
by heat stress due to high ambient temperature and humidity during summer …

Sažetak This study aimed at determining the association between reproductive indexes and
the total milk yield in non-planed lactations≥ 600 days in sub-fertile Holstein cows treated or …

The season of the year (ES), maximum temperature (Tmax) and relative humidity (RH) affect
gestation success of Tropical Milking criollo (TM) heifers, but their effects on the gestation of …

This study aimed to assess the cortisol, body and reproductive development of prepubertal
Holstein and Holstein-Gir ¾ heifers at 27 months of age maintained in an integrated …

2Department of Animal Science, University of Lleida, Avda. Rovira Roure 191, 25198 Lleida,
Spain 3Agrotecnio Center, University of Lleida, Avda. Rovira Roure 191, 25198 Lleida …

Contents This study examines whether the transfer of a fresh in vitro‐produced (IVP) embryo
can avoid the risk of twin pregnancy without reducing the fertility of a cow. The study …

The objective of this study was to evaluate the influence of thermal shock on oocytes used in
the production of in vitro embryos (IVP) of high productivity Holstein cows on the day of …

In this study, we present two proposed approaches to prevent twin pregnancies in dairy
cattle: 1) single, in vitro-produced embryonic transfer into a recipient cow or 2) subordinate …

Heat stress (HS) has been known to cause reproductive failure in animals, especially in
summer. HS severely affects the developmental potential of oocytes and leads to low fertility …