Endocrinology & Metabolic Syndrome
Open Access

Derar Refaat Derar

Publications

• Research Article
  Postpartum Ovarian Resumption in Native Dairy Cows in Upper Egypt and their Relation to Oxidant Antioxidant Status
  Author(s): Derar Refaat Derar, Hamdy Salah Hasab-Enaby, Hasan Hussein Ali, Alaa-Edin Zain and Shehata Hasan ShehataDerar Refaat Derar, Hamdy Salah Hasab-Enaby, Hasan Hussein Ali, Alaa-Edin Zain and Shehata Hasan Shehata
  
  The present study aimed to characterize the follicular pattern and ovarian resumption during the postpartum period in lactating dairy cows in Upper Egypt and study the impact of different components of the antioxidant system on follicular dynamics. Sixteen native dairy cows in their second lactation period were assigned for the current study. Cows were kept indoor and subjected to ultrasonographic examination and bled daily. Data regarding the change in the follicular dynamics and incidence of short cycles were collected and tabulated then statistically analyzed. Blood samples were used to determine nitric oxide (NO), Vitamin A, B-Carotene, Vitamin C and Vitamin E. results of the present study revealed that The first postpartum behavioral estrus observed 35-47 days (41.5 ± 1.86 days postpartum). The average postpartum days required for the animal to come in estrus in cows with tr.. View More»
  DOI: 10.4172/2161-1017.S4-002

  Abstract PDF

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