en Fertility & Infertility Letter to Editor Letter to Editor Mycotoxins, the secondary metabolites produced by several common airborne filamentous fungi, may contaminate human food and animal feeds, especially in developing countries (1, 2). Even though aflatoxin has been widely studied and reported as the most common and important mycotoxin in global and Iranian scientific literature (3, 4), zearalenone (ZEA) has sadly been abandoned, particularly in Iran. ZEA, which is also known as F-2 toxin, ecoestrogen and mycoestrogen, is an estrogenic-like fungal toxin (Figure 1) produced by several Fusarium (F.) species such as F. graminearum, F. culmoru, F. cerealis, F. equiseti, F. verticillioides, and F. incarnatum (5). These fungi commonly contaminate several cereal grains, such as corn (in particular), barley, oats, rye, wheat, rice, sorghum, and their derivatives worldwide (6). Zearalenone, mycoestrogen, infertility 151 153 http://ijrm.ir/browse.php?a_code=A-10-1883-1&slc_lang=en&sid=1 Abbas Ali Jafari-Nodoushan jaabno@gmail.com 0000-0003-3986-1249 Yes Department of Medical Parasitology and Mycology, School of Medicine, Shahid Sadoughi University of Medical Sciences, Yazd, Iran.