Results 51 to 60 of about 26,536 (204)

What is the underlying aneuploidy associated cause of with increasing maternal age? Is it associated with elevated levels of gonadotropins?

, 2006
Aneuploidy is the most common chromosomal abnormality and also is the leading cause of early fetal loss and serious mental retardations. Except for the advanced maternal age, there is no clearly established factor for the development of aneuploidy.
Gultekin, M, Yuce, K, Ayhan, A, Dursun, P   +3 more
core   +1 more source

Seasonal variation in the reproductive activity of male goats raised under tropical climate conditions

Revista Brasileira de Zootecnia
This study analyzed seasonal variations in the testes, the concentration of sex hormones, the parameters of fresh and thawed semen, and the sexual behavior of male Alpine goats from a temperate region in a tropical climate and possible interference with ...
Júlio César Oliveira Dias, Cristina Mattos Veloso, Madriano Christilis da Rocha Santos, Carlos Thiago Silveira Alvim Mendes de Oliveira, Camila Oliveira Silveira, Erick Iglesias, Paula Piccolo Maitan, Letícia Maria Pereira Sanglard   +7 more
doaj   +1 more source

Wastage of gonadotropins during IVF cycles : Real life data from two Italian infertility centers

, 2021
Background: Gonadotropins represent an important component of IVF costs. In order to reduce costs, much attention was given to the type of gonadotropins (recombinant versus urinary) and the daily dose.
Reschini M., Somigliana E., Di Matteo S., Bertoli M., Bardiani I., Caputo A., Colombo G. L., Bruno G. M.   +7 more
core   +1 more source

Perspectives on fish gonadotropins and their receptors

, 2010
84 p., il., y bibliografíaTeleosts lack a hypophyseal portal system and hence neurohormones are carried by nerve fibers from the preoptic region to the pituitary. The various cell types in the teleost pituitary are organized in discrete domains.
Bogerd, Jan, Levavi-Sivan, Berta, Lareyre, Jean Jacques, Mañanós, Evaristo L., Gómez, Ana   +4 more
core   +1 more source

Cloning and co-expression 3 subunits of human gonadotropins ( FSH, LH) [PDF]

, 2016
Background: Human gonadotropins including LH, FSH, and HCG those secreted from ‎anterior pituitary which has an important role in the reproductive system, and belong to glycoprotein hormone families with heterodimeric ‎structure.
Tavasoli, Afsaneh, Bandehpour, Mojgan, Gheibi, Nematollah, Kazemi, Bahram, Piri, Hossein   +4 more
core  

Does blood transfusion affect pituitary gonadal axis and sperm parameters in young males with sickle cell disease?

Indian Journal of Endocrinology and Metabolism, 2013
Objective: We evaluated the effect of packed red cell transfusion (PCTx) on serum concentrations of gonadotropins luteinizing hormone and follicle-stimulating hormone (LH and FSH) and testosterone (T) levels and measured sperm parameters in young adults ...
Ashraf T Soliman, Mohamed Yasin, Ahmed El-Awwa, Mohamed O Abdelrahman, Vincenzo De Sanctis   +4 more
doaj   +1 more source

Changes in Glycosylation of Pituitary Gonadotropins in Polycystic Ovary Syndrome

, 2014
Aim: PCOS has endocrine and metabolic implications leading to a multicausal approach in pathogenesis. We assessed whether PCOS is conditioned by changes in glycosylation of pituitary gonadotropins. Methods: Nested case-control cohort study.
Renata Saucedo Gracía, Hernández-Quijano T, Zárate A, Sandoval A, Marion DH Rosas, Miriam Ruiz Albarrán, Vargas-Girón A, Luis MB Sánchez, Hernández-Valencia M   +8 more
core   +1 more source

Role of Follicle-Stimulating Hormone in Spermatogenesis

Frontiers in Endocrinology, 2018
Spermatogenesis is a concerted sequence of events during maturation of spermatogonia into spermatozoa. The process involves differential gene-expression and cell-cell interplay regulated by the key endocrine stimuli, i.e., follicle-stimulating hormone ...
Olayiwola O. Oduwole, Hellevi Peltoketo, Ilpo T. Huhtaniemi, Ilpo T. Huhtaniemi   +3 more
doaj   +1 more source

Administration of Gonadotropins for Superovulation in Mice

, 2018
For experiments that require large numbers of preimplantation mouse embryos, such as microinjection of zygotes, gonadotropins are administered to females before mating to increase the number of oocytes that are ovulated (i.e., to induce superovulation ...
Richard Behringer, Kristina Vintersten Nagy, Andras Nagy, Marina Gertsenstein   +3 more
core   +1 more source

Pituitary glycoprotein hormone a-subunit secretion by cirrhotic patients

Brazilian Journal of Medical and Biological Research, 1999
Secretion of the a-subunit of pituitary glycoprotein hormones usually follows the secretion of intact gonadotropins and is increased in gonadal failure and decreased in isolated gonadotropin deficiency.
Oliveira M.C., Pizarro C.B., Cassal A., Cremonese R., Vieira J.G.H.   +4 more
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