mRNA expression of insulin-like growth factor-I (IGF-I) is suppressed and those of IGF-II and IGF-binding protein-1 are constantly expressed in the endometrium during use of an intrauterine levonorgestrel system.

Abstract

Insulin-like growth factors (IGF-I and IGF-II) are believed to mediate and modulate steroid hormone actions in the endometrium. In this study we determined the effects of an intrauterine system (IUS), releasing 20 microg levonorgestrel (LNG) daily, on endometrial expression of mRNAs encoding IGFs and insulin-like growth factor binding protein (IGFBP)-1. In… (More)

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