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For this purpose, 10 adult <jats:italic>Maghateer<\/jats:italic> male camels were examined during September 2024 at the end of the non\u2010breeding season. Animals were categorised into a control group (<jats:italic>n<\/jats:italic>\u2009=\u20095) and a treated group that received an intravenous dose of L\u2010citrulline (<jats:italic>n<\/jats:italic>\u2009=\u20095;155\u2009\u03bcmol\/kg BW). Testicular length, volume, coloured area, testicular artery (TA) haemodynamics and hormonal profile were examined along the examination (\u22121, 0, 2, 4, 24, 48, 72, 96 and 120\u2009h after injection). Results represented that no change occurred in testicular length, but the volume was elevated (<jats:italic>p<\/jats:italic>\u2009&lt;\u20090.05) from 4 to 96\u2009h after injection with no interaction between treatment and time, but both TA Doppler indices were declined (<jats:italic>p<\/jats:italic>\u2009&lt;\u20090.05) at 4\u201348\u2009h after injection compared to control. Circulating L\u2010citrulline, NO and E2 levels increased 2\u2009h post\u2010injection until 48\u2009h, then all were declined (<jats:italic>p<\/jats:italic>\u2009&lt;\u20090.05) again with a lowering pattern of total antioxidant capacity (TAC; <jats:italic>p<\/jats:italic>\u2009&lt;\u20090.05), but T took more time to elevate from 4\u2009h until 72\u2009h after injection. L\u2010citrulline could be safe and act as a vasodilator with elevation of steroids (E2 and T), circulating L\u2010citrulline and nitric oxide. This was accompanied by a declination of TAC as early as possible to 48\u2009h. Further studies are needed to show its detailed action on semen quality to be linked with future fertility.<\/jats:p>","DOI":"10.1111\/rda.70079","type":"journal-article","created":{"date-parts":[[2025,5,26]],"date-time":"2025-05-26T07:39:41Z","timestamp":1748245181000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":7,"title":["L\u2010Citrulline Single Intravenous Administration Promotes Testicular Blood Flow, Plasma Testosterone, Estradiol, Circulating Citrulline and Serum Nitric Oxide Levels in Male Camels Under Heat Stress at the End of Non\u2010Breeding Season"],"prefix":"10.1111","volume":"60","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-3137-4166","authenticated-orcid":false,"given":"Elshymaa A.","family":"Abdelnaby","sequence":"first","affiliation":[{"name":"Department of Clinical Sciences College of Veterinary Medicine, King Faisal University  Al\u2010Ahsa Saudi Arabia"},{"name":"Theriogenology Department Faculty of Veterinary Medicine, Cairo University  Giza Egypt"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ibrahim A.","family":"Emam","sequence":"additional","affiliation":[{"name":"Department of Surgery, Anesthesiology and Radiology Faculty of Veterinary Medicine, Cairo University  Giza Egypt"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2025,5,26]]},"reference":[{"issue":"2","key":"e_1_2_9_2_1","first-page":"236","article-title":"Reproductive Hormonal Levels and Nitric Oxide Levels Asguides of Pubertal Reproductive Development in Relation to Testic\u2010Ular Width and Hemodynamics in Baladi Bucks","volume":"10","author":"Abdelkhalek K. 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