Frontiers The Effect of Antioxidants on Sperm Quality Parameters and Pregnancy Rates for Idiopathic Male Infertility: A Network Meta Analysis of Randomized Controlled Trials Acetyl L Carnitine, 500 mg, 120 Vegetarian Capsules The protective effect of L carnitine on testosterone synthesis pathway, and spermatogenesis in monosodium glutamate induced rats BMC Complementary Medicine and Therapies Springer Nature Link Frontiers Antioxidant therapy for infertile couples: a comprehensive review of the current status and consideration of future prospects