Search for dissertations about: "LH hCG"

Showing result 1 - 5 of 9 swedish dissertations containing the words LH hCG.

  2. 1. Intraovarian mechanisms influencing the human corpus luteum

    Author : Ulrika Ottander; Torbjörn Hillensjö; Umeå universitet; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Corpus luteum; steroidreceptors; progesterone; LH hCG; PGF2α; ultrasonography;

    Abstract : Introduction: The human corpus luteum (CL) is a transient endocrine gland, only functionally active for about 14 days. Its principal function is to produce and secrete progesterone and thereby support the endometrium for implantation of a blastocyst and prevent rejection of the developing embryo. READ MORE

  4. 2. Hormonal and paracrine influences on Leydig cell steroidogenesis

    Author : Nina Renlund; Karolinska Institutet; Karolinska Institutet; []
    Keywords : ;

    Abstract : Androgen production by Leydig cells is critical for development of the male reproductive organs and for maintaining normal body homeostasis and fertility later in life. Biosynthesis of testosterone is driven by secretion of the gonadotropin, luteinizing hormone (LH) from the pituitary. READ MORE

  5. 3. Blood flow and metabolism in the corpus luteum of the rat : in vivo and in vitro studies on the ovarian luteal and follicular compartment of the rat

    Author : Mats Gåfvels; Umeå universitet; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Ovary; follicle; corpus luteum; blood flow; metabolism; luteinizing hormone; noradrenaline; antidiuretic hormone;

    Abstract : The ovary undergoes cyclic changes in follicular growth and luteogenesis due to the action of gonadotropins and steroids. The ovary and especially the corpus luteum has an exteremely high blood flow. There is a gap in our knowledge about the physiological role of the high blood flow of the corpus luteum. READ MORE

  6. 4. Intrafollicular pressure and biochemical mediators in ovulation

    Author : Markus Matousek; Göteborgs universitet; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; ovulation; protein tyrosine kinase; ovulation; leukotriene B4; intrafollicular pressure; contractions and smooth muscle cell.;

    Abstract : Ovulation is the process whereby the preovulatory follicle ruptures to enable a fertilisable ovum to escape from the interior of the ovary to the oviduct. During the ovulatory process, from he onset of the preovulatory LH-surge to the follicular rupture, marked biochemical and structural changes in follicles to enable it to rupture. READ MORE

  7. 5. Effects of endocrine disruptors on adreno-cortical and Leydig cell steroidogenesis

    Author : Vichit Supornsilchai; Karolinska Institutet; Karolinska Institutet; []
    Keywords : Endocrine disrupting chemicals EDCs ; steroidogenesis; Leydig cells; adrenocortical cells; steroidogenic acute regulatory protein StAR ; steroidogenic enzymes;

    Abstract : A common sequential pathway for steroidogenesis, designed to produce steroid hormones, is expressed in the adrenal cortex, testes and ovaries. In this process, cholesterol is converted to all known steroids by specific enzymes in a tissue-specific manner. READ MORE