This describes us about the growth pattern of a microbe in a fermenter. This factor has its own significance in determining the best batch timing for product recovery. A typical microbial growth curve is explained on the basis of a typical batch type fermentation which includes Lag phase, Logarithmic/Exponential phase, Static/Stationary phase and Death/Decline phase. Lag Phase is where we find no growth or very minimal growth in the fermenter. Reasons behind are inoculum inoculated into medium need to be adapted to the new environment. In Logarithmic/Exponential phase inoculum got adapted to the environment, here we observe fast growth in population due to rapid division of adapted inoculum and with this phase we find the highest cellular growth rate and rapid utilisation or uptake of nutrients or substrate.