まとめ
卵泡刺激ホルモン (FSH) とルテイン化ホルモン (LH) の夜間排泄パターンは,初潮前の周期的な相互作用を明らかにします. これらのホルモンの急激な上昇は,少女の幼年期において,下垂体-下垂体-卵巣軸の早期発達を示唆する.
科学分野:
- 生殖内分泌学 生殖内分泌学
- 小児内分泌学について
- クロノバイオロジー クロノバイオロジー
背景:
- 生殖機能の発症時期を理解することは,小児の健康にとって極めて重要です.
- 視床下垂体卵巣 (HPO) 軸は,月経周期を調節しますが,その前立腺発育は完全に理解されていません.
研究 の 目的:
- 卵泡刺激ホルモン (FSH) とルテイン化ホルモン (LH) の夜間排泄パターンを,前立腺期と後立腺期の女の子で調べる.
- 周期的なHPO相互作用が月経 (月経) の発生前に発生するかどうかを判断するために.
主な方法:
- 11人の少女の尿中のFSHとLHの分泌の分析.
- ホルモンパターンの低周波と高周波の変動を特定するために,自動回帰的デジタルフィルタリングの適用.
主要な成果:
- 20〜40日ごとに発生するFSHとLHの突起は,前立腺と後立腺の女の子の両方で観察されました.
- 閉経後の6人の女の子のうち3人,閉経前の5人の女の子のうち3人が,これらの周期的なホルモン波を呈した.
結論:
- 初潮前の周期的なFSHとLHの急増の存在は,HPO軸の重要な構成要素が活発であることを示している.
- これらの発見は,周期的な下垂体-下垂体-卵巣の相互作用が,定期的な月経周期の開始前に確立されていることを示唆しています.
関連する概念動画
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At puberty, GnRH begins a pulsatile release pattern, which triggers the anterior pituitary gland to secrete follicle-stimulating hormone (FSH) and luteinizing hormone (LH). The frequency and amplitude of GnRH pulses vary across the menstrual cycle, with faster pulses favoring LH release and slower pulses favoring FSH release.
At puberty, GnRH begins a pulsatile release pattern, which triggers the anterior pituitary gland to secrete follicle-stimulating hormone (FSH) and luteinizing hormone (LH). The frequency and amplitude of GnRH pulses vary across the menstrual cycle, with faster pulses favoring LH release and slower pulses favoring FSH release.
Ovarian Cycle
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Hormonal Control of the Ovarian Cycle
The ovarian cycle is meticulously regulated by the hypothalamic-pituitary-gonadal axis. This cycle orchestrates the release of a mature oocyte, essential for reproduction.
Before puberty, the hypothalamus releases GnRH in a low frequency, low amplitude pulsatile manner. This along with the immature hypothalamic-pituitary-gonadal axis activity, results in low estrogen levels and the absence of a fully functional ovarian cycle. At puberty, GnRH secretion increases in both frequency and...
Before puberty, the hypothalamus releases GnRH in a low frequency, low amplitude pulsatile manner. This along with the immature hypothalamic-pituitary-gonadal axis activity, results in low estrogen levels and the absence of a fully functional ovarian cycle. At puberty, GnRH secretion increases in both frequency and...
The Menstrual Cycle
The menstrual cycle is a recurrent sequence of changes in the uterine endometrium, specifically its functional layer, the stratum functionalis. This cycle prepares the uterus for potential pregnancy. This cycle typically spans 21–35 days, averaging 28 days, and aligns with the ovarian cycle, regulated by fluctuating levels of ovarian hormones, primarily estrogen and progesterone.
The menstrual phase occurs from days 1 to 5 and involves the shedding of the stratum functionalis, as a uterine...
The menstrual phase occurs from days 1 to 5 and involves the shedding of the stratum functionalis, as a uterine...
Menses Phase
The uterine cycle begins with the menstrual phase, which is considered day one of the cycle and typically lasts about five days. This phase is characterized by the degeneration and shedding of the stratum functionalis, the functional layer of the endometrium.
When fertilization does not occur, the corpus luteum deteriorates, causing a significant drop in the levels of estrogen and progesterone in the body. This hormonal decrease triggers the release of prostaglandins, which cause the uterine...
When fertilization does not occur, the corpus luteum deteriorates, causing a significant drop in the levels of estrogen and progesterone in the body. This hormonal decrease triggers the release of prostaglandins, which cause the uterine...
Secretory Phase
The secretory phase of the menstrual cycle, spanning from day 14 to 28 in a typical 28-day cycle, is a period of significant physiological changes in the female reproductive system. This phase commences immediately after ovulation and is characterized by the preparation of the endometrium for potential embryo implantation.
Following ovulation, the corpus luteum, a temporary endocrine structure, produces progesterone and estrogens. These hormones stimulate the growth and coiling of endometrial...
Following ovulation, the corpus luteum, a temporary endocrine structure, produces progesterone and estrogens. These hormones stimulate the growth and coiling of endometrial...


