Bone resorption starts at 14 days of treatment with gonadotropin-releasing hormone agonist in in vitro fertilization cycles

Yilmaz H., Ozgur K., Isikoglu M., Sonmez C., Uner M.

GYNECOLOGICAL ENDOCRINOLOGY, cilt.19, sa.1, ss.40-46, 2004 (SCI-Expanded) identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 19 Sayı: 1
  • Basım Tarihi: 2004
  • Doi Numarası: 10.1080/09513590410001729185
  • Dergi Adı: GYNECOLOGICAL ENDOCRINOLOGY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.40-46
  • Anahtar Kelimeler: bone turnover, GnRH agonist, in vitro fertilization, ovulation induction, urinary cross-linked N-telopeptide, MINERAL DENSITY, BIOCHEMICAL MARKERS, OVARIAN SUPPRESSION, ENDOMETRIOSIS, TURNOVER, WOMEN, MASS, NAFARELIN, DANAZOL
  • Akdeniz Üniversitesi Adresli: Hayır

Özet

The effect of gonadotropin-releasing hormone agonist (GnRH-a) use on bone turnover was investigated in a prospective cohort study of female patients undergoing in vitro fertilization (IVF) treatment. In 46 couples diagnosed with male-factor infertility, the women underwent a long step-down ovulation induction protocol. Urinary cross-linked N-telopeptide (uNTx) level was used to demonstrate bone turnover rate and was measured at the first day of GnRH-a administration, the first day of gonadotropin administration, the day after human chorionic gonadotropin injection and 12 days after embryo transfer. Urinary NTx levels (mean +/- standard deviation (SD)) were 71 +/- 34, 81 +/- 40, 81 +/- 50 and 83 +/- 47 nmol BCE/mmol creatinine (BCE, bone collagen equivalents), respectively. There was no statistically significant difference between the four measurements (p = 0.28). In 19 women GnRH-a was administered for greater than or equal to 14 days. Urinary NTx values of this group and the remaining 27 patients after GnRH-a treatment were 96.2 +/- 40.7 and 71.5 +/- 36.8 nmol BCE/mmol creatinine (mean +/- SD), respectively. The difference between these groups was statistically significant (p = 0.038). These findings suggest that < 14 days' use of GnRH agonist in IVF patients has no effect on bone metabolism. To our knowledge, this is the first study demonstrating that the effect of agonists on bone metabolism starts as soon as estradiol suppression has started.