By Rohith Nair and Aadi Nair (Reuters) -The International Hockey Federation (IHF) and World Triathlon have joined a raft of governing bodies reviewing their policy on the involvement of transgender athletes in women’s sport following last weekend’s ruling by swimming’s top body FINA. On Sunday, FINA voted to ban anyone who has been through male puberty from elite women’s competitions and to create a working group to establish an “open” category for transgender swimmers in some events as part of its new policy. “We are conducting a review of our transgender policy and this is a current work in …