THE RELATIONSHIP BETWEEN HORMONAL DISORDERS AND UTERINE BLEEDING

Аннотация

This article examines the complex relationship between hormonal disorders and uterine bleeding, highlighting how disruptions in the endocrine system affect menstrual cycle regulation. It explores common hormonal conditions such as polycystic ovary syndrome, thyroid dysfunction, hyperprolactinemia, and luteal phase defects, explaining their roles in causing abnormal uterine bleeding. The article also discusses diagnostic approaches and treatment options aimed at restoring hormonal balance and managing bleeding disorders. Understanding thesemechanisms is essential foreffective clinical intervention and improving patient outcomes. Keywords: hormonal disorders, uterine bleeding, abnormal uterine bleeding, polycystic ovary syndrome, thyroid dysfunction, hyperprolactinemia, luteal phase defect, menstrual irregularities, endocrine system, menstrual cycle regulation. Introduction. Uterine bleeding, particularly abnormal uterine bleeding (AUB), is a common gynecological complaint affecting women of reproductive age and beyond. While bleeding patterns can vary throughout themenstrual cycle, persistent irregularities often signal underlying health concerns. One of the primary contributors to abnormal uterine bleeding is hormonal imbalance. Hormones regulate the menstrual cycle and any disruption in this delicate endocrine system can lead to a variety of bleeding disorders. This article explores the connection between hormonal disorders and uterine bleeding, the mechanisms involved, and the clinical implications fordiagnosis and treatment. Understanding the menstrual cycle and hormonal regulation. The menstrual cycle is controlled by the complex interplay of hormones from the hypothalamus, pituitary gland, and ovaries. The key hormones involved include:  Gonadotropin-releasing hormone (GnRH)from thehypothalamus  Follicle-stimulating hormone (FSH) and luteinizing hormone (LH) from the pituitary gland  Estrogen andprogesterone from theovaries These hormones regulate the growth and shedding of the endometrium (the uterine lining). Estrogen promotes endometrial proliferation during the follicular phase, while progesterone stabilizes the lining during the luteal phase. Withdrawal of progesterone leads to menstruation. Hormonal disorders play a pivotal role in the etiology of abnormal uterine bleeding. Understanding the intricate relationship between endocrine function and the menstrual cycle is crucial for accurate diagnosis and effective management. Early recognition and treatment of hormonal imbalances can significantly improve the quality of life for women experiencing uterinebleeding disorders. 57 INTERNATIONAL JOURNAL OF MEDICAL SCIENCES ISSNNUMBER: 2692- 5206 Volume 5,September,2025 Figure 1. Uterine bleeding: how understanding endometrial physiology underpins menstrual health Literature analysis. The relationship between hormonal disorders and uterine bleeding has been extensively studied in gynecological and endocrine research, highlighting the critical role of hormonal regulation in menstrual health. Polycystic Ovary Syndrome (PCOS) is one of the most commonly researched hormonal disorders linked to abnormal uterine bleeding (AUB). According to Azziz et al. (2016), PCOS leads to chronic anovulation, resulting in unopposed estrogen exposure that causes endometrial hyperplasia and irregular bleeding patterns. The Rotterdam criteria, widely used for diagnosing PCOS, emphasize the hormonal imbalance characteristic of the syndrome, which directly correlates with menstrual irregularities (Rotterdam ESHRE/ASRM-Sponsored PCOSConsensus Workshop Group, 2004). Thyroid dysfunction’s impact on menstrual irregularities is well documented. Hypothyroidism, for instance, has been shown to cause menorrhagia, while hyperthyroidism may lead to oligomenorrhea or amenorrhea (Krassas et al., 2010). The mechanism involves altered metabolism of sex hormones and changes in the hypothalamic-pituitary-ovarian axis, which influence the menstrual cycle (De Leo et al., 2016). Hyperprolactinemia, often resulting from pituitary adenomas, suppresses gonadotropin-releasing hormone (GnRH) secretion, leading to decreased luteinizing hormone (LH) and follicle-stimulating hormone (FSH) and subsequent anovulation (Molitch, 2017). The consequent progesterone deficiency manifests as irregular uterinebleeding or amenorrhea. The luteal phase defect, characterized by insufficient progesterone production, has also been implicated in breakthrough bleeding and infertility (Critchley et al., 2006). Although its diagnosis and clinical significance remain debated, hormonal therapy with progesterone supplementation has been shown to improve outcomes in affected women. Perimenopausal hormonal fluctuations have been linked to erratic uterine bleeding patterns. Studies by Burger et al. (2007) demonstrate that the decline in ovarian function and erratic secretion of estrogen and progesterone during this period causes endometrial instability, leading to AUB. Despite a