Search In this Thesis
   Search In this Thesis  
العنوان
Gonadotropin Releasing Hormone (GnRH) Agonists Versus Antagonists in Controlled Ovarian Hyperstimulation Protocols for Intra-Cytoplasmic Sperm Injection (ICSI) Patients /
المؤلف
Hagras, Ahmed Mahmoud Abd Elghany.
هيئة الاعداد
باحث / أحمد محمود عبد الغنى هجرس
مشرف / أشرف المحمدى غريب المطاهر
مشرف / أحمد توفيق مرسي سليمان
مشرف / لا يوجد
الموضوع
Obstetrics. Gynecology.
تاريخ النشر
2015.
عدد الصفحات
p 147. :
اللغة
الإنجليزية
الدرجة
الدكتوراه
التخصص
أمراض النساء والتوليد
تاريخ الإجازة
1/3/2015
مكان الإجازة
جامعة طنطا - كلية الطب - Obstetrics and Gynecology
الفهرس
Only 14 pages are availabe for public view

from 193

from 193

Abstract

The aim of Superovulation for assisted conception treatment techniques is to induce women to produce a larger number of oocytes than the one or two that are required for normal ovulation induction programs . The use of gonadotropin-releasing hormone (GnRH) agonists with gonadotropins has resulted in greater ease of planning the Superovulation stimulation than was possible with the earlier use of clomiphene citrate (CC) with gonadotropins . That regimen had to be monitored carefully in order to predict and prevent the occurrence of an endogenous preovulatory LH surge. In the absence of GnRH analog controlled cycles there is a cancellation rate of 15-20% because oocyte retrieval has to be performed 26-28 hours after the detection of the endogenous LH surge this often meant that oocyte collections were performed at night and at weekends. The continuous administration of GnRH agonists (daily or depot application) initially causes LH and FSH hypersecretion (flare-up), which is followed after a period of about 10 days by desensitization of the pituitary and profound suppression of LH and FSH. This results in the inhibition of ovarian steroidogenesis and follicular growth. This ”medical hypophysectomy” has shown to be beneficial in reproductive steroid-dependent disorders and during IVF treatment to prevent a premature LH surge.