El-Zarkouny, S.Z. <br/><br/>
Lambing and embryonic mortality rates in Awassi and Barki ewes and their crosses throughout three different mating seasons in the West- coastal region of Egypt  [electronic resource]. 
 معدلات الولادات وفقد الأجنة في نعاج العواسي والبرقي وخليطهما خلال ثلاث مواسم تلقيح متتالية في منطقة الساحل الشمالي الغربي بجمهورية مصر العربية. 

 -  2007. 
 - p.15-24 
<br/><br/>Includes references. 
<br/><br/> This study was conducted to determine whether early diagnosis of pregnancy with ultasonography and reintroduction of rams to non-pregnant ewes for additional two estrous cycles would increase pregnancy rate and increase lambing crop. fertile rams were introduced to a totla of 335 awassi and Barki ewes and their corsses for 30 days during three consecuthre mating seasons: Spring autumn, and winter. 
<br/><br/><br/>Summary in Arabic. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Sheep--Reproduction.<br/>Sheep--Diseases.<br/>Sheep--Pregnancy--Diagnosis<br/>Livestock--Embryos--Mortality.