The first step in human creation is union between a sperm from male and an ovum from female , the sex of embryo belongs , according to previous hadeeth , to the prevailing fluid . As it is known now that ovum is one type ; containing an x-chromosome , but sperms occur in 2 types , X- chromosome carrying sperm & Y-chromosome carrying sperm . It was described that sex of embryo is determined according to type of sperm that fertilizes the ovum : if a Y-carrying sperm fertilizes the ovum , a male child is produced & when X- carrying sperm fertilizes the ovum , a female child is produced. In other wards , male is the one who is responsible for sex determination . The previous hadeeth determines that participation of both parents is required to determination of sex .