Elevated basal FSH levels, if it is under 15 IU/L, will not reflect poor ART outcomes

  • Rieko Kojima
  • Koji Nakagawa
  • Akira Nakashima
  • Takashi Horikawa
  • Shirei Ohgi
  • Hidekazu Saito
Original Paper



For this study, the impact of basal FSH levels on ART outcomes was assessed.


From June 2003 to May 2006, 191 ART cycles were performed in our hospital. All cases were treated with GnRH-a long protocol. The patients were classified according to their basal FSH level as follows: group A: FSH < 10 IU/l, group B: 10 ≦ FSH < 15 IU/l, and group C: 15 IU/l ≦ FSH. ART outcomes were compared among the three groups.


The number of retrieved oocytes in group A was significantly higher than in group B, but fertilized oocytes and the pregnancy rates were comparable. The pregnancy rate in group C was not significantly lower than those found in either group A or B, but the trend was lower.


Oocytes retrieved from the patients who showed basal FSH levels below 15 IU/l were found to possess significant pregnancy potential.


ART Basal FSH Pregnancy rate 


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Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  • Rieko Kojima
    • 1
  • Koji Nakagawa
    • 1
  • Akira Nakashima
    • 1
  • Takashi Horikawa
    • 1
  • Shirei Ohgi
    • 1
  • Hidekazu Saito
    • 1
  1. 1.Division of Reproductive Medicine, Department of Perinatal Medicine and Maternal CareNational Center for Child Health and DevelopmentTokyoJapan

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