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EWG: IUI with or without ovarian stimulation

Bernard (Ben) Cohlen
EWG: IUI with or without ovarian stimulation

Bernard (Ben) Cohlen
Bernard (Ben) Cohlen, MD, Gynecologist Specialized in Fertility
Fertility Center Isala, Isala Clinics Zwolle, The Netherlands

I was born in 1963 in Leiden. I went to the University of Ghent, Belgium and Groningen, The Netherlands for my MD. Thereafter I did my PhD in Utrecht (with Prof te Velde and Prof Habbema) on the subject of intra-uterine insemination.

I’m head of the Fertility Center Isala, Isala Clinics Zwolle, one of the largest Fertility Clinics in the Netherlands. Our clinics focusses on patient-centered care and research.

Ten most recent publications

  • The addition of GnRH antagonists in intrauterine insemination cycles with mild ovarian hyperstimulation does not increase live birth rates--a randomized, double-blinded, placebo-controlled trial. Cantineau AE, Cohlen BJ, Klip H, Heineman MJ; The Dutch IUI Study Group Collaborators. Hum Reprod. 2011 May;26(5):1104-11. Epub 2011 Feb 20.
  • Prognostic value of the postcoital test for spontaneous pregnancy. Leushuis E, van der Steeg JW, Steures P, Koks C, Oosterhuis J, Bourdrez P, Bossuyt PM, van der Veen F, Mol BW, Hompes PG; CECERM study group (including Cohlen BJ). Fertil Steril. 2011 May;95(6):2050-5. Epub 2011 Mar 27.
  • Copy number variants on the X chromosome in women with primary ovarian insufficiency. Knauff EA, Blauw HM, Pearson PL, Kok K, Wijmenga C, Veldink JH, van den Berg LH, Bouchard P, Fauser BC, Franke L; Dutch Primary Ovarian Insufficiency Consortium (including Cohlen BJ). Fertil Steril. 2011 Apr;95(5):1584-8.e1.
  • Risk of borderline and invasive ovarian tumours after ovarian stimulation for in vitro fertilization in a large Dutch cohort. van Leeuwen FE, Klip H, Mooij TM, van de Swaluw AM, Lambalk CB, Kortman M, Laven JS, Jansen CA, Helmerhorst FM, Cohlen BJ, Willemsen WN, Smeenk JM, Simons AH, van der Veen F, Evers JL, van Dop PA, Macklon NS, Burger CW. Hum Reprod. 2011 Dec;26(12):3456-65. Epub 2011 Oct 26
  • Spontaneous LH surges prior to hCG administration in unstimulated-cycle frozen-thawed embryo transfer do not influence pregnancy rates. Groenewoud ER, Kollen BJ, Macklon NS, Cohlen BJ. Reprod Biomed Online. 2012 Feb;24(2):191-6. Epub 2011 Nov 10.
  • Limited contribution of NR5A1 (SF-1) mutations in women with primary ovarian insufficiency (POI). Janse F, de With LM, Duran KJ, Kloosterman WP, Goverde AJ, Lambalk CB, Laven JS, Fauser BC, Giltay JC; Dutch Primary Ovarian Insufficiency Consortium (including Cohlen, BJ). Fertil Steril. 2012 Jan;97(1):141-6.e2. Epub 2011 Nov 17.
  • Management of male-factor infertility. Tournaye HJ, Cohlen BJ. Best Pract Res Clin Obstet Gynaecol. 2012 Jun 15. [Epub ahead of print]
  • Cryo-thawed embryo transfer: natural versus artificial cycle. A non-inferiority trial.(ANTARCTICA trial). Groenewoud ER, Macklon NS, Cohlen BJ. BMC Womens Health. 2012 Sep 5;12(1):27. [Epub ahead of print]
  • Intra-uterine insemination for unexplained subfertility. Veltman-Verhulst SM, Cohlen BJ, Hughes E, Heineman MJ. Cochrane Database Syst Rev. 2012 Sep 12;9:CD001838.
  • Long-term follow-up of laparoscopic electrocautery of the ovaries versus ovulation induction with recombinant FSH in clomiphene citrate-resistant women with polycystic ovary syndrome: an economic evaluation. Nahuis MJ, Oude Lohuis E, Kose N, Bayram N, Hompes P, Oosterhuis GJ, Kaaijk EM, Cohlen BJ, Bossuyt PP, van der Veen F, Mol BW, van Wely M. Hum Reprod. 2012 Sep 20. [Epub ahead of print]