title: [Dynamics of follicle development in stimulated in vitro fertilization cycles--sonographic follow-up and findings following follicle puncture].
abstract: Results of ultrasonical folliculometry during treatment by 5 different stimulation protocols were evaluated in 122 cycles of IVF-patients. Additionally, the structure of follicular population was investigated by measurement of follicular volume which was the basis of a follicular hierarchy. - Number of developing, sonographically detectable and punctured follicles increased significantly from stimulation by Clomiphene to stimulation by Folistiman. Only in stimulation by Clomiphene number of sonographical visible follicles was in accordance with laparoscopically punctured follicles. Development of relationship of the follicular classes during treatment supports hypothesis that exogenous gonadotropins do not increase follicular recruitment in the follicular phase but prevent atresia of follicles recruited earlier. Long lasting action of FSH as in stimulation by gonadotropins stimulates a greater number of follicles more intensively as demonstrated by an increased follicular volume in follicles with high rank numbers in gonadotropin treated patients compared with treatment by Clomiphene and Clomiphene/Anthrogon. Very high FSH-levels probably cause a heterogenous population of follicles with an increased number of small follicles at time of follicular puncture.
mesh_terms: D006063:Chorionic Gonadotropin / Q000008:administration & dosage; D002996:Clomiphene / Q000008:administration & dosage; D005260:Female; D005307:Fertilization in Vitro; D005640:Follicle Stimulating Hormone / Q000097:blood; D005500:Follow-Up Studies; D006801:Humans; D007247:Infertility, Female / Q000473:pathology*; D006080:Ovarian Follicle / Q000187:drug effects / Q000473:pathology*; D010062:Ovulation Induction; D014463:Ultrasonography
chemical_list: D006063:Chorionic Gonadotropin; D002996:Clomiphene; D005640:Follicle Stimulating Hormone
vernacular_title: Zur Dynamik der Follikelentwicklung in stimulierten IVF-Zyklen--sonografische Verlaufsuntersuchungen und Befunde nach der Follikelpunktion.