RESUMO
Background: Retained placenta (RP) is failure on fetal membranes expulsion in first 12 h postpartum. RP promotes delay in uterine involution and resumption of ovarian postpartum activity, besides increasing risk of uterine infections, being the major reason for low fertility of dairy cows. There are many treatments for RP however there are controversies about the efficacy of these methods, thus limited treatments effectiveness emphasize the importance of RP prevention. This study aimed to evaluate the effects of parity and calving season in RP incidence, in milk production and in calving to conception interval (CCI), as well as RP effects on these variables. Materials, Methods & Results: Data were collected at a farm located in Rio Paranaíba city, Minas Gerais state, Brazil during 2012, whose herd was composed by 700 Holstein dairy cows producing 32 kg of milk production per day. Calving of 291 cows was registered during the experiment period. To diagnose RP occurrence, cows were observed immediately after calving, and when was possible also during calving, and those cows that had not eliminated all of placenta until 12 h after fetal expulsion was considered with RP. The effects of parity and calving season on RP incidence were analyzed by logistic regression, and the effects of parity, calving season and RP occurrence on milk production and on CCI duration were evaluated b
A retenção de placenta (RP) se caracteriza pela falha na eliminação das membranas fetais nas primeiras 12 h após a expulsão do feto, devido à inabilidade de separação da conexão materno-fetal e quando o quadro se instala, a placenta permanece retida em torno de sete dias. Como consequência, há atraso tanto no processo de involução uterina quanto no reinício da atividade ovariana no pós-parto, além de elevar a ocorrência das infecções uterinas, sendo esta a razão principal da baixa fertilidade de vacas leiteiras acometidas por esta patologia. [...]
RESUMO
Background: Retained placenta (RP) is failure on fetal membranes expulsion in first 12 h postpartum. RP promotes delay in uterine involution and resumption of ovarian postpartum activity, besides increasing risk of uterine infections, being the major reason for low fertility of dairy cows. There are many treatments for RP however there are controversies about the efficacy of these methods, thus limited treatments effectiveness emphasize the importance of RP prevention. This study aimed to evaluate the effects of parity and calving season in RP incidence, in milk production and in calving to conception interval (CCI), as well as RP effects on these variables. Materials, Methods & Results: Data were collected at a farm located in Rio Paranaíba city, Minas Gerais state, Brazil during 2012, whose herd was composed by 700 Holstein dairy cows producing 32 kg of milk production per day. Calving of 291 cows was registered during the experiment period. To diagnose RP occurrence, cows were observed immediately after calving, and when was possible also during calving, and those cows that had not eliminated all of placenta until 12 h after fetal expulsion was considered with RP. The effects of parity and calving season on RP incidence were analyzed by logistic regression, and the effects of parity, calving season and RP occurrence on milk production and on CCI duration were evaluated b
A retenção de placenta (RP) se caracteriza pela falha na eliminação das membranas fetais nas primeiras 12 h após a expulsão do feto, devido à inabilidade de separação da conexão materno-fetal e quando o quadro se instala, a placenta permanece retida em torno de sete dias. Como consequência, há atraso tanto no processo de involução uterina quanto no reinício da atividade ovariana no pós-parto, além de elevar a ocorrência das infecções uterinas, sendo esta a razão principal da baixa fertilidade de vacas leiteiras acometidas por esta patologia. [...]