A study conducted in 22 patients who used intranasal buserelin, in a long-term protocol for IVF, showed that pituitary desensitization is obtained between 14 days and 1 month. Analysis of the trials in this series, where the results were not satisfactory, suggests that the bioavailability of the product used intranasally, may be in question. A better distribution of nasal sprays causes more discomfort than when used subcutaneously.
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Georgian Med News
February 2022
1Institute of Experimental Medicine, Department of Neuropharmacology, St. Petersburg; Russia.
Kisspeptin is the peptide product of the KiSS-1 gene and endogenous agonist for the Kiss1 receptor. It is known that kisspeptin, acting centrally, stimulates secretion of gonadoliberin (GnRH). Kisspeptin interacts with other neuropeptides such as neurokinin B and dynorphin, to regulate GnRH pulse generation and also plays a role in sexual behaviour.
View Article and Find Full Text PDFInt J Endocrinol
May 2015
Department of Gynecology-Andrology, Cliniques Universitaires Saint-Luc, Institut de Recherche Expérimentale et Clinique (IREC), Université Catholique de Louvain, 1200 Brussels, Belgium.
Background. The aim of this pilot study was to evaluate intranasal buserelin for luteal phase support and compare its efficacy with standard vaginal progesterone in IVF/ICSI antagonist cycles. Methods.
View Article and Find Full Text PDFHum Reprod
June 2012
Assisted Reproduction Unit, Biogenesis, Thessaloniki, Greece.
Background: In view of the current debate concerning possible differences in efficacy between the two GnRH analogues used in IVF stimulated cycles, the current study aimed to explore whether progesterone control in the late follicular phase differs when GnRH antagonist is used as compared with GnRH agonist, and if so, to what extent the progesterone rise affects the probability of pregnancy.
Methods: Overall 190 patients were randomized: 94 in the GnRH-agonist group and 96 in the GnRH-antagonist group. The GnRH-agonist long protocol started on Day 21 of the preceding cycle with intranasal buserelin (600 mg per day).
Drugs
November 2010
Adis, a Wolters Kluwer Business, Auckland, New Zealand.
Dienogest (Visanne®) is a synthetic oral progestogen with unique pharmacological properties that is indicated at a dosage of 2 mg/day for the treatment of endometriosis. It is generally highly selective for the progesterone receptor and displays strong progestational effects and moderate antigonadotrophic effects, but no androgenic, glucocorticoid or mineralocorticoid activity. Dienogest has moderate affinity for progesterone receptors (10% that of progesterone) and at a dosage of 2 mg/day only moderately suppresses estradiol levels.
View Article and Find Full Text PDFWomens Health (Lond)
January 2010
Department of Obstetrics & Gynecology, Tottori University Faculty of Medicine, Yonago, 683-8504, Japan.
Dienogest (DNG), a progestin of 19-nortestosterone derivative, has good oral bioavailability and is highly selective for progesterone receptors. Owing to its antiovulatory, antiproliferative activities in endometrial cells, and its inhibitory effects on the secretion of cytokines, DNG is expected to be an effective treatment for endometriosis. Progesterone receptor-binding affinity is higher for DNG than for progesterone.
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