Avtor/Urednik		Vrtačnik-Bokal, E; Meden-Vrtovec, H; Virant-Klun, I; Verdenik, I
Naslov		Prolonged HCG action affects angiogenic substances and improves follicular maturation, oocyte quality and fertilization competence in patients with polycystic ovarian syndrome
Tip		članek
Vir		Hum Reprod
Vol. in št.		Letnik 20, št. 6
Leto izdaje		2005
Obseg		str. 1562-8
Jezik		eng
Abstrakt		Background: The aim of this study was to determine whether, in polycystic ovarian syndrome (PCOS) patients, HCG action prolonged for 4 h improves the action of angiogenic substances [ovarian renin angiotensin system and vascular endothelial growth factor (VEGF)], and consequently follicular maturation, oocyte quality and oocyte tertilization competence. Methods: In this prospective study 20 patients with PCOS undergoing IVF were included. Oocyte retrieval was carried out either 34 or 38 h after HCG administration. Each follicle was analysed for prorenin, active renin, VEGF and estradiol. Oocytes were evaluated for quality (mature, immature, degenerated oocytes), as were the embryos (low or high). Results: In the HCG + 38 h group there were 245 follicles, and in the HCG + 34 h group 240 follicles. In the HCG + 38 h group, log active renin was lower (2.78 +- 0.20 versus 2.91 +- 0.25; P < 0.001) and VEGF higher (2276.0 +- 790.1 versus 1946.6 +- 954.5 pg/ml; P < 0.001). The odds ratio for obtaining oocytes from follicles was 1.6 [95% confidence interval (CI) 1.1-2.6; P = 0.02], and for developing high quality embryos 7.6 (95% CI 2.8-20.9; P < 0.001) in favour of the HCG + 38 h group. Conclusions: Follicular maturation and oocyte quality are related to the intrafollicular influences of active renin and VEGF in a time-dependent manner after HCG administration, whereas fertilization competence is related to VEGF only.
Deskriptorji		GONADOTROPINS, CHORIONIC RENIN POLYCYSTIC OVARY SYNDROME FERTILIZATION IN VITRO OOCYTES FOLLICULAR FLUID ESTRADIOL ENDOTHELIUM, VASCULAR ENDOTHELIAL GROWTH FACTORS PROSPECTIVE STUDIES