Background: This study was conducted to evaluate the effects of feeding on biochemical parameters in terms of metabolic profile in female and male lambs of Dorper and Lacaune breeds at the developmental stages from birth. 
 
Methods: A total of 32 singleton newborn Dorper and Lacaune breed lambs (n= 8 for each group; male and female) were used. The trial was continued total of 5 nutritional periods each of 21-day after the first two weeks (0-14 days) suckling period. The biochemical parameters determined were paraoxonase 1 (PON1), ischemia modified albumin (IMA), total protein (TP), albumin (ALB), aspartat amino transferase (AST), alanin amino transferase (ALT), alkaline phosphatase (ALP) and malondialdehyde (MDA). 
 
Result: PON1 activity of all lambs was found to be low during the suckling period (P&le;0.001). The highest IMA value was reached in against to the decrease in TP and ALP levels during the weaning period (P&le;0.001). There was no difference between the groups in terms of PON1, TP, ALB and ALP. Increases were observed in the AST, ALT, IMA and MDA levels of male Dorpers. (P&le;0.05). It was concluded that adaptation periods to solid feeds may cause oxidative damage or variable metabolic activity in male Dorpers.

The Effects of Pre-weaning and Post-weaning Feeding Periods on Biochemical Parameters in Terms of Metabolic Profile in Dorper and Lacaune Lambs

<div>Background: Seasonal anestrus in ewes reduces reproductive efficiency and hinders productivity. Exogenous hormones can be used to facilitate the induction and synchronization of estrus in the anestrus period. The aim of this study was to evaluate the pregnancy rate in ewes after the treatment with different hormones and fixed time artificial insemination.&nbsp; 
 
Methods: The ewes were randomly divided in 4 (n=4) groups: Melatonin group (Group 1), Melatonin and Medroxyprogesterone group (Group 2), Medroxyprogesterone group (Group 3) and control group (Group 4). Pregnancy rate, estrus induction rate and litter size were determined and compared.&nbsp;&nbsp; 
 
Result: The estrus induction rate in our study was 100% for the first 3 groups and 6.25% for the 4th group. The pregnancy rate was between 4.16% (group 4) and 95.83% (group 2). For the others groups the values were 89.58% for the first group and 91.67%, for the 3rd group. The prolificacy rate was between 1 (control group) and 1.71 (2nd group), with intermediate values for the other 2 groups: 1.21 for 1st group and 1.27 for the 3rd group.</div>

<div style="text-align:justify">Comparative Data about Estrus Induction and Pregnancy Rate on Lacaune Ewes in Non-breeding Season after Melatonin Implants and Intravaginal Progestagen</div>