"Some Reproductive Problems in Friesian Cows Raised in Yemen (2- Retained Placenta)"
Makaleler > Tam Makale · 2021
Yazarlar: Hafsa Al-Yamani
Biomedical Journal of Scientific & Technical Research, Uluslararası, 2021, cilt 40
DOI: 10.26717/bjstr.2021.40.006498
Özet
BackgroundReproductive problems have an essential effect on the productivity of dairy cows by reducing reproductive efficiency and shortening the length of productive life by increasing exclusion and reducing milk production [1].There is a positive genetic relationship between reproductive problems in cows and the level of productivity and longevity.Thus, achieving maximum improvement Hereditary depends on the existence of an effective program to treat reproductive problems in the herd.Unlike this program, reproductive issues may lead to the loss of cows and increase the length of a generation, which leads to a decrease in the amount of genetic improvement achieved in a certain period [2].The bovine placenta is classified as Cotyledonary Placenta and consists of Uterine Caruncles on the maternal and Fetal Cotyledons.From the side of the fetus and together, they form the placenames [3].The primary function of the placenta is the exchange of nutrients from the mother with the excretory products of the developing fetus.In addition to that, it acts on the secretion of estrogen and several secondary steroids and their receptors [2].The placenta or "fetal membrane" is a significant organ for nutritional and oxygen supply from the dam to the fetus in the uterine [3].The placenta is complex hormones, and they begin to separate from the mother before birth and shortly after birth through a hormonal process.The exit of the placenta from the uterus (up to 12 hours) for any reason.This condition is called the retained placenta.Usually, part of the placenta is retained in the uterus, resulting in no estrus.In this case, the corpus luteum may be affected, and the mother will be calving stillbirth and secrete the hormone progesterone, which prevents the occurrence of estrus [2].The causes of placental retention vary, including genetic and non-genetic.Also, among the reasons for placental retention