title: Effects of aging on menstrual cycle hormones and endometrial maturation.
abstract: OBJECTIVE
  To investigate changes in menstrual cycle hormones and endometrial maturation that may contribute to the decline in fertility with aging.
  
  
  METHODS
  Prospective controlled clinical study.
  
  
  METHODS
  Normal human volunteers in an academic research institution.
  
  
  METHODS
  Women with regular menstrual cycles.
  
  
  METHODS
  Thirty-two women, aged 20 to 30 or 40 to 50 years, had daily blood drawing starting on cycle day 6 to 10 and continuing until 2 days after the onset of next menses. In addition, 60 women, aged 20 to 30 or 40 to 50 years, had a total of 93 endometrial biopsies performed on day 7 to 9 after the LH surge.
  
  
  METHODS
  Serum LH, FSH, E2, inhibin, P, and placental protein 14 (PP14) levels and histologic maturation of the endometrium.
  
  
  RESULTS
  Serum FSH levels were increased whereas inhibin concentrations were reduced in the luteal-follicular transition of women > 40 years. No other hormonal changes were seen in this population, including P and PP14 secretion. Disruption of endometrial maturation occurred at a similar frequency in both age groups.
  
  
  CONCLUSIONS
  Follicular recruitment, but not luteal function or endometrial maturation, is disturbed in cycling women > 40 years and may contribute to the decline in fertility with aging.
authors.affiliation: National Institute of Child Health and Human Development, Warren Grant Magnuson Clinical Center, National Institutes of Health, Bethesda, Maryland 20892, USA.
authors.forename: M C
authors.initials: MC
authors.lastname: Batista
authors.forename: T P
authors.initials: TP
authors.lastname: Cartledge
authors.forename: A W
authors.initials: AW
authors.lastname: Zellmer
authors.forename: M J
authors.initials: MJ
authors.lastname: Merino
authors.forename: C
authors.initials: C
authors.lastname: Axiotis
authors.forename: W J
authors.initials: WJ
authors.lastname: Bremner
authors.forename: L K
authors.initials: LK
authors.lastname: Nieman
mesh_terms: D000328:Adult; D000375:Aging / Q000502:physiology*; D004717:Endometrium / Q000502:physiology*; D004958:Estradiol / Q000097:blood; D005260:Female; D005640:Follicle Stimulating Hormone / Q000097:blood; D000071816:Glycodelin; D006023:Glycoproteins; D006728:Hormones / Q000097:blood*; D006801:Humans; D007265:Inhibins / Q000097:blood; D007986:Luteinizing Hormone / Q000097:blood; D008597:Menstrual Cycle / Q000502:physiology*; D008875:Middle Aged; D011257:Pregnancy Proteins / Q000097:blood; D011374:Progesterone / Q000097:blood; D011446:Prospective Studies
chemical_list: D000071816:Glycodelin; D006023:Glycoproteins; D006728:Hormones; C045246:PAEP protein, human; D011257:Pregnancy Proteins; D011374:Progesterone; D004958:Estradiol; D007265:Inhibins; D007986:Luteinizing Hormone; D005640:Follicle Stimulating Hormone