In this thesis, the effect of organic selenium and vitamin E, yeast strain Saccharomyces cerevisiae - Levucell SB Titan, and Arginine on the sows’ body productivity, body condition and growth rate of piglets, were evaluated. Data from the sows and piglets was collected in four categorical phases starting from the period of gestation, farrowing, lactation, and weaning. The average performance of the sows and piglet attributes to determine the piglets’ immune competence and survivability was analysed using a generalised linear model of SAS Ondemand for Academics (SAS Institute inc, Cary, NY, USA) and the mean differences were tested by Tukey test. Average data was collected on the performance of the sow and piglet parameters like the sow feed intake, sow live weight at the start, sow live weight at weaning, sow backfat at the start of the experiment, sow backfat at the weaning period and the piglet parameters such as the number of total piglets born, number of piglets born alive, number of still born piglets, number of mummies born, number of piglets at egalization, number of piglets at weaning, piglet weight at birth, piglet average daily gain, piglet weight at egalization, piglet weight at weaning. The findings in this study revealed that dietary manipulation of the sows’ diet with organic selenium and vitamin E, yeast strain Saccharomyces cerevisiae - Levucell SB Titan, Arginine Amino acid did not have a significant effect on the sows’ productivity, body condition and the growth rate of piglets.