Endocrine - Placenta Development

Introduction

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

Trophoblast hCG function

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)

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Cite this page: Hill, M.A. (2024, April 18) Embryology Endocrine - Placenta Development. Retrieved from https://embryology.med.unsw.edu.au/embryology/index.php/Endocrine_-_Placenta_Development