“…However, the criteria of diagnosis of endometriosis may differ between centres and interpretation or recognition of these criteria may be inconsistent. These forms of treatment are not without associated side-effects, the most common of which are reported to be weight gain, nausea (Chalmers, 1968 ;Kistner, 1965;Richter, 1968;Williams, 1967) and menstrual disorders or breakthrough bleeding (Chalmers, 1968;Richter, 1968;Riva et al, 1958).…”