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Faculty members

Content

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DERAR REFAAT IBRAHEEM MOHAMMAD

College
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Personal data

  • dr.mohammad@qu.edu.sa
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    Scientific qualifications

    • Bachelor of Veterinary Medicine
    • Master of Veterinary Medicine
    • Doctor of Philosophy in Veterinary Science

    Research interests

    • Animal reproduction
    • Fertility issues in livestock herds
    • Reproductive diseases in horses
    • Reproductive Biotechnology

    Published research

    • Pseudopregnancy in dromedary camels: hematological and biochemical profiles and therapeutic responses (2025-12-16)
    • Pseudopregnancy in dromedary camels: Characterization, prevalence, and clinical and hormonal properties (2025-01-23)
    • Fetometry in Arabian horses (2025-10-23)
    • Granulosa cell tumor in Arabian mares: prevalence, risk factors, clinical and histopathological findings, and outcome of surgical removal (2025-11-13)
    • Management strategies, reproductive performance and causes of infertility in sheep flocks in the central region of Saudi Arabia (2020-07-01)
    • Cadmium in Seminal Plasma of Fertile and Infertile Male Dromedary Camels (2020-01-01)
    • Effect of Zinc, Selenium, and Vitamin E Administration on Semen Quality and Fertility of Male Dromedary Camels with Impotentia Generandi (2020-07-06)
    • Diagnostic evaluation of subclinical endometritis in dromedary camels (2020-04-01)
    • Clinical and subclinical endometritis in dromedary camels: An overview of definition and clinical presentation, etiopathogenesis, diagnostic biomarkers, and treatment protocols (2023-09-06)
    • Ultrasonography for the detection of pregnancy and study of embryonic and fetal development in camels, buffaloes, and sheep: Techniques, equations, and limitations (2024-07-31)
    • First report on the isolation of Chlamydia abortus from female dromedary camels with ovarian hydrobursitis (2022-08-15)
    • Ovary and ovarian bursa in dromedary camels: Clinical relevance of the topographical features (2020-05-01)
    • Relationships among the corpus luteum, follicles and conceptus in sheep (2020-08-09)
    • Etiological analysis and diagnosis of reproductive disorders in male dromedary camels (2021-07-20)
    • The Use of Matrix-assisted Laser Desorption Ionization Time-of-Flight Mass Spectrometry for the Identification of Bacterial Agents Involved in Subclinical Endometritis in Female Dromedaries (2023-04-01)
    • Expression of Hormones, Cytokines, and Antioxidants in Heat-Stressed Subfertile Female Dromedaries (2022-08-01)
    • Subclinical endometritis in repeat breeder female dromedaries (2017-09-28)
    • Serum trace elements associated with different forms of infertility in rams (2026-04-20)
    • Factors affecting reproductive performance in dromedary camel herds in Saudi Arabia (Vol. 50, p. 1155, 2018) (2019-09-05)
    • Impotentia generandi in male dromedary camels: heavy metal and trace element profiles and their relations to clinical findings and semen quality (2019-06-06)
    • Factors affecting reproductive performance in dromedary camel herds in Saudi Arabia (2018-06-05)
    • EXPRESSION PROFILES OF STRESS BIOMARKERS DURING FOETOTOMY IN DROMEDARY CAMELS (2018-03-07)
    • Ultrasound detection of fetal sex in production animals: A comparative, mechanistic, and field-oriented synthesis (2026-07-04)
    • Male Dromedary Reproductive Emergencies: Clinical Presentation, Diagnosis, Management, and Prognosis (2026-07-01)
    • Is the presence of overgrown follicles in dromedary camels a pathological phenomenon? (2020-02-27)
    • Changes in Semenogelin I and II of Asthenozoospermic Camels (2020-02-27)
    • Scrotal enlargement in rams and bucks in the Qassim region of central Saudi Arabia: clinical, ultrasonographic findings, and seroprevalence of brucellosis (2019-09-05)
    • TUMORS IN DROMEDARY CAMELS: PREVALENCE, TYPES, AND LOCATIONS (2018-11-30)
    • Impotence of generation in male dromedary camels: FSH, LH and testosterone profiles and their association with clinical findings and semen analysis data (2018-09-27)
    • Fetotomy in dromedary camels: An evaluation of 50 cases (2017-12-25)
    • A congenital case of intermediate-type fetal rhabdomyoma in an Ardi goat kid (2016-12-25)
    • A retrospective study on clinical findings of 7300 cases (2007-2014) of infertile female dromedaries (2015-12-25)
    • High culling rate and disappointing reproductive performance in female dromedary camels affected with vaginal adhesions (2015-12-25)
    • The postpartum period in dromedary camels: Uterine involution, ovarian activity, hormonal changes, and response to GnRH treatment (2014-12-25)
    • Comparative clinical and epidemiological characteristics, risk factors, and outcomes of uterine torsion in camels, buffaloes, and cattle: a multicenter study (2026-03-22)
    • Understanding infertility in female dromedary camels: from congenital disorders to management challenges (2026-03-15)
    • Changing patterns of infertility in female dromedary camels in Saudi Arabia: A clinical survey of 633 cases (2026-03-15)
    • Dynamic changes of small, medium, and large follicles during the estrous cycle in thoroughbred mares (2026-03-15)
    • Regression models for predicting gestational age and estimating fetal sex in Arabian horses (2026-03-15)
    • Breed-specific ovarian responses to the GnRH agonist in mares: Implications for estrus and ovulation indices (2026-03-15)
    • Ovarian hydrobursitis and chlamydial infection in dromedary camels: diagnosis, impact, and management (2026-03-15)
    • Fetal mummification in an Arabian mare: A rare case with radiographic and histopathological findings (2026-03-15)
    • Doppler Waveform Alterations of the Supratesticular Artery and Associated Semen Biomarkers in Infertile Male Dromedary Camels (2026-02-01)
    • Clinical significance of overgrown follicles in dromedary camels: prevalence, risks, hemodynamics, and response to prostaglandin F2α (2025-12-31)
    • Fertility indices of dromedary camels in Saudi Arabia (2025-04-12)
    • Doppler ultrasonography could be an important tool to detect fetal viability in female dromedaries affected by postcervical uterine torsion. (2025-04-12)
    • Evaluation of three protocols for ovulation synchronization and timed insemination in Arabian mares (2025-04-12)
    • Clinical and hormonal characterization of pseudopregnancy in camels (2025-04-12)
    • Non-ischemic priapism in a male dromedary: A case report (2022-04-20)
    • The Use of Infrared Thermography to Determine the Time of Estrus in Dromedary Camels (2022-04-20)
    • Morphology, blood flow velocity, and hormonal content of overgrown follicles in dromedary camels (2022-04-20)
    • Azoospermia in male dromedary: Clinical findings, testicular biopsy, serum follicle-stimulating hormone, and seminal biomarkers (2019-01-22)
    • ADENOCARCINOMA IN THE GENITAL TRACT OF INFERTILE FEMALE DROMEDARY CAMELS (2018-11-30)
    • Effect of exogenous estradiol benzoate on uterine blood flow in postpartum dairy cows (2018-05-11)
    • RENAL CELL CARCINOMA IN A FEMALE ARABIAN CAMEL (2017-11-19)
    • Ultrasound of clinically significant disorders in the female dromedary camel genital tract (2017-09-28)
    • Sensitivity of Different Microbial Isolates to Selected Antimicrobials In Vitro in Repeat Breeder Cows and Buffaloes in Upper Egypt (2017-12-25)
    • Erectile dysfunction in male dromedary camels: Clinical findings and changes in nitric oxide metabolite, cardiac troponin I, and testosterone concentrations (2017-12-25)
    • Clinical Findings and Reproductive Performance of Female Dromedaries Affected by Vaginal and Cervical Adhesions and Stenosis (2016-12-25)
    • Dystocia in dromedary camels: Prevalence, forms, risks, and hematobiochemical changes (2016-12-25)
    • Phimosis in male dromedary camels: Clinical findings and changes in the hemogram, nitric oxide metabolites, and testosterone concentrations (2016-12-25)
    • Transabdominal Ultrasonography for Pregnancy Diagnosis and Estimation of Gestational Age in Dromedary Camels (2015-12-25)
    • Ovarian, endocrinological, and metabolic changes in ewes supplemented with short-term metabolic energy during the estrous cycle (2015-12-25)
    • Improvement of pregnancy rate in sheep using different hormonal treatments at the time of mating (2015-12-25)
    • Influence of stimulation by electroejaculation on myocardial function, acid-base and electrolyte status, and hematobiochemical profiles in male dromedary camels (2014-12-25)
    • Impotentia generandi in male dromedary camels: Clinical findings, semen characteristics, and testicular histopathology (2014-12-25)
    • Plasma Steroid Hormone Concentrations and Blood Flow in the Ovarian Structures of the Female Dromedary (Camelus dromedarius) During Growth, Dominance, Spontaneous Ovulation, Luteinization, and Regression of the Follicular Wave (2014-12-25)
    • Ultrasonographic Fetometry and Prenatal Fetal Sex Assessment in Camels (Camelus dromedarius) (2013-12-25)
    • Serum biochemical and hematological reference values for mid-term pregnant buffaloes (2013-12-25)
    • CHARACTERIZATION OF FOLLICULAR AND LUTEAL BLOOD FLOW IN FEMALE DROMEDARY CAMELS INDUCED TO OVULATE USING A GnRH ANALOGUE (2012-12-25)
    • Changes in blood flow in ovine follicles and serum concentration of estradiol 17 beta (E2) and nitric oxide (NO) around the time of ovulation in Ossimi ewes (2013-12-25)
    • A Comparative Study on Behavioral, Physiological, and Adrenal Changes in Buffalo Blood Cortisol During Actual Labor (2012-12-25)
    • Ovarian Response and Progesterone Profile During the OVSYNCH Protocol in Buffalo Heifers and Postpartum Buffalo Cows (Bubalus bubalis) (2012-12-25)
    • Effect of transient high-energy diets just after ovulation on ovarian performance and metabolic status in cyclic ewes (2013-12-25)
    • Characterization of Immunoreactive IGF-I Pattern During the Peri-ovulatory Period of the Oestrous Cycle of Thoroughbred Mares and Its Relation to Other Hormones (2012-12-25)
    • Reference values for the genitalia of male dromedary before and after puberty using caliper and ultrasonography in subtropics (2012-12-25)
    • The Effect of Parity on the Efficacy of an Ovulation Synchronization (Ovsynch) Protocol in Buffalo (Bubalus bubalis) (2012-12-25)
    • Ultrasonic characteristics of follicular dynamics during the estrous cycle in native jennies and mares in Upper Egypt (2011-12-25)
    • Clinical, Hematological, and Biochemical Findings of Uterine Torsion in Buffaloes (Bubalus bubalis) (2011-12-25)
    • Reproductive performance of Farafra ewes in the subtropics (2009-12-25)
    • Forms of Reproductive Disorders in Cattle and Buffaloes in Middle Egypt (2009-12-25)
    • Seasonal variation of ovarian follicular dynamics and luteal functions of sheep in the subtropics (2006-12-25)
    • Insulin-like growth factor-I as a follicular growth promoter during early pregnancy in thoroughbred mares (2005-12-25)
    • Effect of active immunization of pony mares against recombinant porcine inhibin α subunit on ovarian follicular development and plasma steroids and gonadotropins (2004-12-25)
    • Endocrinological Changes Before and After Removal of Granulosa Theca Cell Tumors (GTCTs) Affecting the Ovary in 6 Mares (2003-12-25)
    • Spontaneous repair of the atrophic contralateral ovary without ovariectomy in the case of a granulosa theca cell tumor (GTCT) affected mare (2003-12-25)
    • Localization of inhibin α-, βA-, and βB-subunits and aromatase in ovarian follicles with granulosa theca cell tumor (GTCT) in 6 mares (2003-12-25)
    • Effect of zinc, selenium, and vitamin E administration on seminal antioxidant status and lipid peroxidation in infertile male dromedary camels (2023-07-08)
    • Surgical Management of Severe Uterine Torsion in a Mid-Gestation Dromedary Camel (2026-03-15)
    • SERTOLI-LEYDIG CELL TUMOR IN A FEMALE DROMEDARY CAMEL (2020-02-27)
    • Clinicopathological Features of an Ovarian Teratoma in an Arabian Mare (2023-07-08)
    • Vaginal and cervical tumors in dromedary camels (2017-12-25)
    • Umbilical cord torsion as a rare cause of abortion in a dromedary camel: A case report (2026-03-15)
    • A retrospective study on uterine and vaginal prolapse in female dromedaries (2017-09-28)

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