“… Temperature, pH of an isotonic solution, Osmolarity, and Type of media, Oxygenation, Season, Ionic strength of media, and Medicinal plants and drugs (Chikezie, 2007;Oyewale et al, 2011;Habibu et al, 2016;Islah et al, 2016;Igbokwe & Igbokwe, 2016a;Igbokwe & Igbokwe, 2016b) Intrinsic factors such as age, genes, species, breed, phenotype, gender, pregnancy and lactation, egg laying, size, and differences in erythrocyte membrane composition (Habibu et al, 2013;Igbokwe et al, 2015a;Igbokwe et al, 2015b;Igbokwe et al, 2016c) can also affect the osmotic fragility of erythrocytes. Haematological disorders, glycemia, and disease processes can also increase or decrease the resistance of erythrocytes to haemolysis (Kobo et al, 2014).…”