Browsing Articles publicats (Ciència Animal) by Author "De Rensis, F."
Now showing items 1-7 of 7
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Climate factors affecting conception rate of high producing dairy cows in northeastern Spain
García Ispierto, Irina; López Gatius, Fernando; Bech Sàbat, Gregori; Santolaria Blasco, Pilar; Yániz Pérez de Albéniz, Jesús; Nogareda, Carmina; De Rensis, F.; López-Béjar, M. (Elsevier, 2007)Summer heat stress is a main factor related to low conception rate in high producing dairy herds in warm areas worldwide. We assessed the impact of several climate variables on conception rate in high producing dairy cows ... -
Effect of utilization of single or double prostaglandin administration within an ovsynch fixed-time artificial insemination protocol during summer season in dairy cows
Morini, Giorgio; López Gatius, Fernando; García Ispierto, Irina; De Rensis, F. (De Gruyter Open, 2019-07-30)This study investigated the fertility of dairy cows during summer season after treatment with a single or double PGF2α in a progesterone (P4)-based Ovsynch protocol for fixed-time artificial insemination (FTAI). The data ... -
Effects of different five-day progesterone-based synchronization protocols on the estrous response and follicular/luteal dynamics in dairy cows
López Gatius, Fernando; López-Helguera, Irene; García Ispierto, Irina; De Rensis, F. (Society for Reproduction and Development, 2015)This study compared the responses shown by lactating dairy cows to four different P4-based protocols for AI at estrus. Cows with no estrous signs 96 h after progesterone intravaginal device (PRID) removal were subjected ... -
Prepartum blood lead concentrations linked to subsequent cyclicity in high-producing dairy cows in a non-industrial area
García Ispierto, Irina; López-Helguera, Irene; Ramos Girona, Antonio J.; Marín Sillué, Sònia; Companys Ferran, Encarnació; Puy Llorens, Jaume; Galceran i Nogués, Josep; De Rensis, F.; López Gatius, Fernando (Elsevier, 2016-09-01)This study sought to identify the possible presence of lead (Pb) in blood and if detected to examine the relationship between blood Pb concentrations during the transition period and subsequent reproductive performance in ... -
Relationship between heat stress during the peri-implantation period and early fetal loss in dairy cattle
García Ispierto, Irina; López Gatius, Fernando; Santolaria Blasco, Pilar; Yániz Pérez de Albéniz, Jesús; Nogareda, Carmina; López-Béjar, M.; De Rensis, F. (Elsevier, 2006)The aim of the present study was to establish whether temperature-humidity index values, as a measure of heat comfort, from Days 1 to 40 of gestation could be associated with the pregnancy loss rate in high producing dairy ... -
Thermal Mechanisms Preventing or Favoring Multiple Ovulations in Dairy Cattle
De Rensis, F.; Morini, Giorgio; García Ispierto, Irina; López Gatius, Fernando (MDPI, 2021-02-08)While cows are predominantly monovular, over the past 30 years the incidence of multiple ovulations and thus twinning has increased considerably alongside milk production. Multiple pregnancies are not desirable as they ... -
To what extent does photoperiod affect cattle reproduction? Clinical perspectives of melatonin administration
De Rensis, F.; Morini, Giorgio; García Ispierto, Irina; López Gatius, Fernando (De Gruyter Open, 2020-08-01)The seasonality of reproduction in most mammals is dictated by photoperiod, temperature and nutrition. Melatonin, mainly synthesized in the pineal gland, is generally accepted as the active mediator of photoperiod responses ...