The present study was designed to evaluate the effect of magnetic water and flock age on semen parameters, egg quality traits, some hatching traits and hatchling internal organs weight for Golden Sabahia strain chickens. Two hundred and eighty females with twenty eight males from this strain at two different ages 35 and 50 weeks were used in this experiment. Besides, 80 cocks (20 cocks / group) used for semen evaluation. Birds of each age were divided into two groups, the 1st drank non magnetic tap water (TW) and the 2nd group drank water exposed to magnetic field (MFW). The main results could be summarized as follows:
1- In Golden Sabahia strain, drank elder cocks with MFW significantly improved ejaculate volume, sperm concentration, motility percentage and number of live sperm compared with elder cocks non-drinking magnetic water.
2- Interaction between magnetic water and flock age reveals that the best improvement of egg weight and shell weight % were observed for MFW × old group.
3- Fertility and hatchability percentages improved for eggs produced from hens drank magnetic water compared with control groups. Also, drank elder chickens magnetic water (MFW × old) significantly improved fertility % compared to (TW × old ) group.
4- At 18 day of incubation, the relative weight of yolk sac was higher in eggs produced from birds drank magnetic water compared with those drank non magnetic tap water (P≤0.05).
5- Drinking chickens with MFW realized the heaviest chicks body weight at hatch and significantly increased of chick length when compared with the control group for this strain. Also, drinking elder hens with magnetic water improved chick length (MFW × old) compared to (TW × old) and (TW × young) groups.
6- Magnetic water had no influence on internal organs weight of chicks at hatch and egg shell weight at 14 and 18 day of incubation.
It was concluded that treated Golden Sabahia strain with magnetic water improved semen parameters, egg quality traits, fertility and hatchability percentages especially for older age.