Endocrine - Placenta Development

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Introduction

Pregnancy Test

For complete notes on placenta development and function see Placenta Development.

Endocrine Links: Introduction | BGD Lecture | Science Lecture | Lecture Movie | pineal | hypothalamus‎ | pituitary | thyroid | parathyroid | thymus | pancreas | adrenal | endocrine gonad‎ | endocrine placenta | other tissues | Stage 22 | endocrine abnormalities | Hormones | Category:Endocrine
Historic Embryology - Endocrine  
1903 Islets of Langerhans | 1903 Pig Adrenal | 1904 interstitial Cells | 1908 Pancreas Different Species | 1908 Pituitary | 1908 Pituitary histology | 1911 Rathke's pouch | 1912 Suprarenal Bodies | 1914 Suprarenal Organs | 1915 Pharynx | 1916 Thyroid | 1918 Rabbit Hypophysis | 1920 Adrenal | 1935 Mammalian Hypophysis | 1926 Human Hypophysis | 1927 Adrenal | 1927 Hypophyseal fossa | 1930 Adrenal | 1932 Pineal Gland and Cysts | 1935 Hypophysis | 1935 Pineal | 1937 Pineal | 1935 Parathyroid | 1940 Adrenal | 1941 Thyroid | 1950 Thyroid Parathyroid Thymus | 1957 Adrenal

| Lecture - Placenta Development

  • Human chorionic gonadotrophin (hCG) - like leutenizing hormone, supports corpus luteum in ovary, pregnant state rather than menstrual, maternal urine in some pregnancy testing
  • Human chorionic somatommotropin (hCS) - or placental lactogen stimulate (maternal) mammary development
  • Human chorionic thyrotropin (hCT)
  • Human chorionic corticotropin (hCACTH)
  • progesterone and estrogens - support maternal endometrium
  • Relaxin
  • Placenta - Maternal (decidua) and Fetal (trophoblastic cells, extraembryonic mesoderm) components
  • Endocrine function - maternal and fetal precursors, synthesis and secretion
    • Protein Hormones - chorionic gonadotropin (hCG), chorionic somatomammotropin (hCS) or placental lactogen (hPL), chorionic thyrotropin (hCT), chorionic corticotropin (hCACTH)
      • hCG - up to 20 weeks, fetal adrenal cortex growth and maintenance
      • hCS – rise through pregnancy, stimulates maternal metabolic processes, breast growth
    • Steroid Hormones - progesterone (maintains pregnancy), estrogens (fetal adrenal/placenta)

Human Chorionic Gonadotrophin

Trophoblast hCG function

Human chorionic gonadotrophin (hCG) like leutenizing hormone, supports corpus luteum in ovary, pregnant state rather than menstrual.

Presence in the maternal urine is the basis of some pregnancy testing.

Trophoblast cell hCG.jpg

Trophoblast cell hCG


Links: NIH - The History of the Pregnancy Test

References


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  • Endocrine Development - All (14277) Review (4620) Free Full Text (3140)

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Cite this page: Hill, M.A. (2024, March 28) Embryology Endocrine - Placenta Development. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/Endocrine_-_Placenta_Development

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© Dr Mark Hill 2024, UNSW Embryology ISBN: 978 0 7334 2609 4 - UNSW CRICOS Provider Code No. 00098G