“…In regards to development rates, FBS increased the production of blastocysts, in agreement with many previous reports [8,55,56]. Some components known to be present in FBS, such as albumin, fatty acids, amino acids, vitamins, growth factors, chelating agents [4,57,58], and factors with a high antioxidant capacity, are all likely to play a role in ensuring overall higher rates of embryo development [6,7,10]. Notwithstanding, which particular serum factors are responsible for improved development remain unknown.…”