Faced with the suspect free radicals formation in animal organism can have a negative influence in bovine reproduction and be one of the multiple causes of dairy cattle reproductive efficiency decrease in last years, in this study we make an extensive literature review about possible good effects of two antioxidants, vitamin A and its precursor β-carotene, on cattle reproduction with the aim of analyse its therapeutic possibilities. In accordance with the study results, we observe that in reproductive processes there is an important free radicals formation that may damage reproductive system cells, including gametes and embryos, it causes some effects like failures in oocyte maturation process and early embryo growth, that move on to a reproductive failure. Nevertheless, under normal conditions, animal organism keeps balance between free radicals and antioxidants. This balance prevents reproductive problems occurrence, therefore when it is broken, as a result of low antioxidants levels in diet, increase on its demand on heat-stress, elevated rate of free radicals production or several treatments that increases reproductive organs activity (superovulation); in all this cases reproductive problems appear and it may be necessary exogenous antioxidants supplementation.