Daily News from New York, New York • 38

mm Actress strangled in apt. I lm A i 1 i i- i i reports that Mark had lived in the five-room apartment with Heiss and her roommate, school teacher Anilda Lozada, and that the couple had fought after the women told him to move out POLICE DECLINED to list Mark as a suspect, and said they only wanted to question him. "It's too early in the investigation," a detective said. "We're still talking with all her friends and neighbors." Detectives also were questioning workmen who had been installing storm windows in the building Thursday. The slim, curly-haired actress was found when Lozada returned to the apartment at about 8:10 p.m.

Thursday. She was fully clothed and lying face up in the living room, police said. "We didn't find any evidence of robbery and there was no sign of forced entry," according to Detective Lt James Cowan of the Midtown North station, indicating Heiss may have known her killer. Neighbor Graciella Lopez, who usually greeted Heiss on the stoop of the apartment building when the actress came home from work, said she did not see her Thursday night But, she said, she heard "one long, long scream" come from the sixth floor at about 4:30 p.m., not quite four hours before the body was discovered. HEISS WORKED in television in Chicago before coming to New York to make commercials and play minor -parts in soap operas.

Her apartment building, occupied largely by actors and actresses, is located in Theater Row, across the street from Manhattan Plaza, a federally subsidized complex for performing artists. In between acting jobs, she worked as a barmaid at Amy's Pub on Ninth Ave. Another barmaid there, Linda DaGrossa, said the slain woman was "very nice and very ambitious professionally. She worked here for about three years." By JOHN RANDAZZO and BRIAN KATES A 37-year-old actress was found strangled with an electric cord in the living room of her apartment on the West Side's Theater Row, police said yesterday. Detectives yesterday were seeking to question the boyfriend of Judy Heiss, who was found dead in her sixth floor walk-up at 413 W.

43d St, where she had lived since moving from Chicago six years ago. Her boyfriend, whom police would identify only as a slim, sandy-haired man named Mark, was seen with her on the day of her death, and neighbors said they had quarreled. "We saw her Thursday morning and she looked quite upset," said one tenant who asked not to be identified. "She had been arguing with her boyfriend over the weekend." Detectives were investigating JL jfc. Judy Heiss found dead In her apartment art -ft- I Vtl il 1- A 13 ff- 111 A 'yf'rTl Expecting four, they Nurse Donna Rledemann shows off the quintuplets born to Jennifer Joyce In Neptune, N.J., late Thursday.

get 1 more By FRANK McKEOWN A young New Jersey couple who had expected quadruplets was trying to figure out yesterday how many more diapers would be needed to handle five not four infants. Jennifer Joyce and her husband, Jeremiah, were surprised late Thursday night when doctors at the Jersey Shore Medical Center in Neptune, N.J., delivered the quintuplets. The two girls and three boys were delivered by Caesarean section. Doctors initially told the Joyces, who had tried to have children for 18 months, that they would not be able to. The couple was referred to a fertility clinic operated by Middlesex Hospital, where Mrs.

Joyce', 27, was put on fertility drugs. "I only went for one month on the fertility drugs," she said at a hospital press conference yesterday. "It works. Five children are a lot better than none. Go for it" JOYCE SAID HIS wife used to come home from baby showers for other women feeling depressed, complaining that she was "never going to have any children." Joyce, an economics teacher at St Rose High School in Belmar, conceded he was stunned at the births, but said: "It's wonderful, bringing five souls to into the world.

It's something God entrusts to you. We're thankful for it." The Joyces have a six-bedroom home in Sea Girt, and said space should be no problem. But raising five children at one time? "We'll figure it out day by day," he said. Joyce, who is also a tennis coach, said he plans to get tennis rackets, get the kids out on the courts and go for sports scholarships. The children, whose weights range from 1 pound, 12 ounces to 3 pounds, will remain at the hospital until they attain weights of at least five pounds, Mrs.

Joyce said. Because of the infants premature arrival they were a month early the hospital has them listed in critical but stable condition. There has never been a baby shower for Mrs. Joyce, but friends were betting yesterday that she would be getting one or maybe five. Q.

8 8 "It was so quick and so smooth and everything went so well," said Dr. Mark Faict, who performed the delivery at the Princess Fabiola hospital in the family's hometown of Blancken-berge, a coastal resort 75 miles northwest of Brussels. "WE DID A REGULAR Caesarean section under local anesthetic and all the babies were delivered in 12 minutes. The mother is doing very well and her large offspring, too," Faict said. The babies were kept in special incubators.

Brussels (UPD Belgium's first set of sextuplets and their 24-year-old mother, a nurse who took fertility drugs, are all healthy and doing well, their doctor said yesterday. Ria Gadeyne gave birth to a girl and five boys, weighing from 2.9 pounds to 3.3 pounds. She is the first woman known to have sextuplets in Belgium and only the llth this century in the world. After a pregnancy of about 84 months, the babies arrived at two-minute intervals Wednesday..