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. 2019 Apr 17;10:248. doi: 10.3389/fendo.2019.00248

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Copyright © 2019 Bjelobaba, Janjic, Prévide, Abebe, Kucka and Stojilkovic.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Estrous cycle influences OPN expression in the pituitary tissue. Gonadotrophs were more intensively labeled in diestrus (D), when compared to proestrus (P) and estrus (E). Scale bar = 20 μm applies to all images.