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Using a GnRH agonist for final oocyte maturation rather than hCG results in an elimination of the risk of ovarian hyperstimulation syndrome, while having a delivery rate after IVF of approximately 6% less. [28] Unlike the agonist protocol, the antagonist protocol is rapidly reversible because the GnRH receptors are merely blocked but functional.
The risk is further increased by multiple doses of hCG after ovulation and if the procedure results in pregnancy. [2] Using a GnRH agonist instead of hCG for inducing final oocyte maturation and/or release results in an elimination of the risk of ovarian hyperstimulation syndrome, but a slight decrease of the delivery rate of approximately 6%. [3]
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Human chorionic gonadotropin (HCG or hCG) in a low dose, which may be injected after completed ovarian stimulation. Final maturation with hCG is also termed hCG priming. [7] Ovulation will occur between 38 and 40 hours after a single HCG injection. [8] It is also used in in vitro fertilization, where it makes the follicles perform their final ...
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Human chorionic gonadotropin is a glycoprotein composed of 237 amino acids with a molecular mass of 36.7 kDa, approximately 14.5kDa αhCG and 22.2kDa βhCG. [4]It is heterodimeric, with an α (alpha) subunit identical to that of luteinizing hormone (LH), follicle-stimulating hormone (FSH), thyroid-stimulating hormone (TSH), and a β (beta) subunit that is unique to hCG.
TVOR is typically performed after ovarian hyperstimulation, where oocytes are pharmacologically stimulated to mature. When the ovarian follicles have reached a certain degree of development, induction of final oocyte maturation is performed, generally by an intramuscular or subcutaneous injection of human chorionic gonadotropin (hCG). [10]
Theca lutein cyst is a type of bilateral functional ovarian cyst filled with clear, straw-colored fluid. These cysts result from exaggerated physiological stimulation (hyperreactio luteinalis) due to elevated levels of beta-human chorionic gonadotropin (beta-hCG) or hypersensitivity to beta-hCG.