Pituitary hormones
Feedback hypothalamus and pituitary
vascular connection
Thyroid gland
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•
Histogenesis in embryo
•
Colloid in follicles
early fetus
•
Thyroid hormone
second trimester
•
Pituitary TSH
(Thyroid stimulating hormone)
Hypothalamus TRH
(Thyrotropic releasing hormone)
later second trimester
Anterior pituitary
Hypothalamus
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