Oxidative stress induced by excessive and unopposed levels of reactive oxygen species in male reproductive system results in impaired sperm quality, fertilization capacity and poor embryo development. Our goal is to assess the potential effects of Aquilaria malaccensis(AM) leaves, a plant with strong antioxidant property on early embryo development in vitroand embryo quality following fertilization with cyclophosphamide (CP) exposed rat sperm. Materials and Methods:Twenty four male Sprague Dawley rats were allocated into eight groups of three rats (n = 3): control, CP only (200 mg/kg), AM only (100 mg/kg, 300 mg/kg and 500 mg/kg) and CP + AM (100 mg/kg, 300 mg/kg and 500 mg/kg). Animals were sacrificed after 63 days of treatment and sperm from caudal epididymis were taken for in vitrofertilization (IVF) with oocytes from untreated female. Fertilization, embryo division and embryo morphology were examined at 8 and 48 hours post insemination and compared between groups. Statistical evaluations were performed using Chi-Square test and Fisher’s exact test and p-value