For comparing reproductive performance of sexed versus conventional semen a total of 3573 heifer insemination records collected from five herds in four provinces of Iran were investigated. The studied provinces were classified into three regions: hot semiarid (Tehran and Alborz provinces). temperate semiarid (Khorasan Razavi province) and cold semiarid (Zanjan province). Various param... https://www.pomyslnaszycie.com/