Table 1.

Winston and Margara staging system of tubal disease [23].

Stage I	Thin-walled hydrosalpinx with little or no fibrosis. Mucosa thrown into folds with no flattened areas. Adhesions (if present) flimsy and limited to the ampulla and ovary only. Ovary present and mainly free.
Stage II	Thick-walled hydrosalpinx with good mucosa. Mucosa flattened with attenuated or few folds but thin-walled areas. Mucosal fold markedly adherent in lumen. Fibrous thick adhesions involving tube and/or ovary. Ovary present and mainly free.
Stage III	Combination of thick-walled hydrosalpinx with marked mucosal damage or thick fibrous adhesions. Clean hydrosalpinx with thin wall but with nodularity of patent isthmus. Ovary incarcerated against pelvic side wall or absent on that side.
Stage IV	Tubo-ovarian mass or fibrous, adherent hydrosalpinx with incarcerated ovary and/or isthmic damage.