In the Sverdlovsk region, holstinized black-and-white cattle of Ural type is bred, which represented by large, highly productive animals with a high genetic potential for productivity. The purpose work to study dynamics live weight cows age and its relationship milk animals, there an increase in 22.6 kg (from 3 4 lactation) – 46.2 first 2 or 3.4 7.9%. With weight, was yields up lactation, then ...

Several studies have suggested that lactation performance may be programmed by the number of fetuses during pregnancy, whereas other studies indicate that processes during lactation are more important. As gestation litter size and litter size in lactation are usually strongly correlated, separating the roles of pregnancy and lactation in lactation performance is difficult. To break this link, w...

A 2 x 2 factorial arrangement of treatments in a randomized block design was used to determine the effects of dietary Arg supplementation during gestation and lactation on the lactation performance of 38 first-parity sows. At 30 d of gestation, pregnant gilts were allotted based on BW to 1 of 2 diets supplemented with 1% L-Arg.HCl or 1.7% L-Ala (isonitrogenous control). After farrowing, sows we...

A dynamic model of the lactating dairy goat, combining a minimum of mechanistic representations of homeorhetic regulations and a long-term approach, was developed. It describes (i) the main changes in body weight, dry-matter intake, milk production and composition of a dairy goat; (ii) the succession of pregnancy and lactation throughout the productive life; and (iii) the major changes in dynam...

The regulation of mitochondrial biogenesis and function in the lactating mammary cell is poorly understood. The goal of this study was to use proteomics to relate temporal changes in mammary cell mitochondrial function during lactation to changes in the proteins that make up this organelle. The hypothesis tested was that changes in mammary cell mitochondrial biogenesis and function during lacta...

OBJECTIVE To review the toxicity issues of commonly used antirheumatic drugs in pregnancy and lactation. METHODS A review of the medical literature using Medline database via Ovid was performed to identify the toxicities of antirheumatic drugs in pregnancy and lactation. RESULTS Many rheumatologic diseases in women often first present during the childbearing years. In most cases, antirheuma...

Health management of cystic fibrosis (CF) patients should be maximized during pregnancy and breastfeeding because of its significant impact on the maternal and newborn outcomes. Thus, numerous drugs will have to be continued during pregnancy and lactation. Most of the drugs representing CF treatment lines cross the placenta or are excreted into human milk. Research addressing the risks and bene...

Background: The flowers, calyx and seeds of Hibiscus sabdariffa L. (Malvaceae) are used in traditional medicine for management of edema, cancer, constipation, hypertension, fever, liver and nerve diseases. In Nigeria, a decoction of the seeds is used in folk medicine to enhance or induce lactation in cases of poor milk production. But its potential for toxicity when administered during pregnanc...

The major problems for the dairy practices in the tropical country are low milk yield and short lactation period of either pure exotic or crossbred dairy cattle. Many factors affect milk production in dairy cattle in tropical areas including high environmental temperature and humidity, lower genetic potential for milk production in indigenous cattle and inadequate supply of food during the dry ...

The kinetics of endogenous urea were compared during the last month of pregnancy, lactation, and a nonpregnant, nonlactating control period in Sardi sheep kept on a constant feed level. Urea entry rate estimated by injections of [14C]urea rose by 36% during pregnancy. Renal urea excretion was reduced by 40% during pregnancy and by 28% during lactation. Consequently, fractional urea recycling wa...