first, go to the room where the male cat spends most of its time. remove the male from the room and let the female walk around. she will put her scent in the room so put her in places where the male sleeps, plays, and eats. remove the female and release the male back in. do this for about a week then try having them meet through a glass door or screen. if they seem calm, have one person hold the female and another person hold the male and let the male small the females "rear". do the same for the female. eventually you can put them together but ultimately, your the judge. if they don't seem relaxed or the male is growling or hissing wait. if the female is growling or hissing shes prob. just scared.