The fruit fly Drosophila melanogaster has short time life span, these flies, are particular advantage for ageing work, including , life history which  divided up into distinct, morphological stages so that the period growth and development can be readily distinguished from the sexual mature ageing adult phase. Sexual selection aging means differential reproduction owing variation in the ability to obtain mates and fertilized oocytes. A few experimental studies have shown that the optimum strategy for males is often to mate with as many females as possible, whereas the optimum strategy for females is likely to select the most attractive male. As a result the mating males to females, the repetitive of mating is very important on the rate of fertility of females, if males has been twice mating by females usually the fertility will be decreased, here the function some secretion from ejaculate of males is very important.  Recently the performance of male accessory gland proteins (Acps) were found in Drosophila melanogaster. Acps have been observed cause of increasing female oviposition rates, also increasing the rate of fertility, hatchability, son mating ability, mediate sperm storage, cause part of the survival cost mating male to females, may protect reproductive tracts or gametes from microbial attack, and also hundreds function known and unknown on the reproductive performance in males and females. However, until to date were found almost 25 to 150 proteins in male accessory glands, but also still were not distinguished function of all those proteins. Supporting these hypotheses, here we study the function of ageing on the rate of male sexual secretion and reproductive performance in offspring fitness.  The objective of the current study is two-fold: the first aim is to evaluate mechanisms of sexual selection on the age affective in parental traits and second aim, is to evaluate mechanisms of sexual selection on the offspring fitness traits for their potential  explained by random mating in the species Drosophila melanogaster.