litterbox regression

Question
i have a male cat that is fixed and he almost refuses to use the litterbox he poops in the kitchen sink,beside the litterbox and most recently the bedroom. Im alomost 40wks pregnant with my first child and cant have a cat like that i have to other cats but they seem to do right HELP PLEASE i am to the point of killing the cat its gone on for to long  

Answer
You could try Cat Attract. Its a special cat litter sold at Petsmart that is supposed to lure cats back to using their litterpan..
Make sure the pan is thoroughly cleaned with dish soap and water once a week with fresh litter added.  Also the pan needs to be scooped atleast once a day.
You shouldn't go near the litterpan since you are pregnant, of course..so you will have to have another family member do the duty
Also use a litterpan w/o a hood and put it in a location with some privacy and quiet area (not near the washer or high traffic areas for example)