جستجوی مقالات مرتبط با کلیدواژه « pregnancy » در نشریات گروه « محیط زیست »

This study was aimed to evaluate the effects of supplementary feeding on productive and reproductive performance of Zel sheep breed, in mating, late pregnancy and lactating periods. For this purpose, 120 ewe Zel, 2-5 years old, average body weight of 33.8 ± 4.78 kg that had reproductive, were selected from the Zel flock of National research station of Gavdashat Mazandaran province and divided to two same group. The treatments contained; The first group (control); the ewes fed with basal diet + 100 gr concentrates in late pregnancy and the first two months of lactating, The second group (Experimental group); the ewes fed with basal diet + 200, 300 and 400 gr concentrates in mating, late pregnancy and the first two months of lactating periods, respectively. Each group was divided to two subgroups of 30 heads, and then entrance to a pen with a ram for 40 days. The results showed that, apparent fertility, prolificacy, ewe reproductive performance, and ewe productive performance of control and experimental groups, were 85% and 90%, 111.8% and 114.8%, 95% and 103.3%, and 91.7% and 107.7%, respectively. The live body weight of ewe after parturition, was not significant between control and experimental groups. The lamb’s birth weight of experimental group (3.4 kg) was significantly higher than control group (3.0 kg, (p<0.05), but the weaning weight of lambs (13.5 and 14.7 kg, in control and experimental group respectively), did not affected by supplementary feed. In general, using supplementary dietary in concentrate form, in mating, late pregnancy, and lactating periods, improves the reproduction performance, and ewe production performance, and economical efficiency of sheep breeding units.

Zataria multiflora is one of the plants that has become popular due to its suitable compounds. Pregnancy is a high-risk period in which the consumption of substances that affect the number and sex of the neonate can cause disorders. The aim of this study was to investigate the effect of thyme consumption during pregnancy on the number and sex of births of Wistar rats. This study was performed on 32 female Wister rats weighing 210±10g and 6 month’s y/o who were randomly divided into 4 equal groups. Zataria multiflora Hydro alcoholic extract was prepared by distillation and different concentrations (400, 800, 1000 mg / kg / day) were administered by gavage during pregnancy. The control group, only received normal food and water. After birth, the number and sex of newborns were calculated. Findings were analyzed by SPSS software using one-way analysis of variance. The results showed a significant decrease in the total number of births and the number of births of male infants in the study groups. There was no significant difference in the number of live and dead infants and the number of female infants in the study groups. Consumption of thyme during pregnancy reduces the number of births and births of male rats, so precautions should be taken when using it during pregnancy.

Vitamin D is one of the essential ingredients in terms of metabolic and physiological processes in the human body.25-Hydroxyvitamin D[25(OH)D] is the most sensitive index of vitamin D status and reflective of its dietary intake and skin production. Considering the importance of vitamin D in human body, especially in pregnant women and in turn in their infants, the present study was conductedto examine the association of air pollution with serum 25(OH)Din pregnant women and in the umbilical cord of their newborns. This cross-sectional study was conducted in 2012 in Isfahan, Iran. This study comprised 100 pregnant women and their newborns. The air quality index (AQI) was registered. The associations of AQI and 25(OH)D were assessed by multiple linear regression. The independent inverse association of 25(OH)D with air quality can explain the high prevalence of hypovitaminosis D in pregnant women living in this sunny region.