Talk:Endocrine - Placenta Development

Introduction

Pregnancy Test

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

| 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)

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