MATTHEW LAVIETES  TRANSGENDER women may not participate in elite and international women's rugby, the sport's global governing body World Rugby has announced, amid a heated debate on the issue in sports leagues and LGBT+ communities. In new guidelines, World Rugby said the naturally acquired physical benefits that trans women receive by going through male puberty and the safety concerns for other female players made trans women ineligible for competition. However it said trans men could compete in men's contact rugby. "Given the best available evidence for the effects of testosterone reduction on these physical attributes for transgender women, it was…