The Calgary Guide to Understanding Disease @TheCalgaryGuide
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Menstrual Cycle Physiology: Ovarian Cycle – Brief Overview
LH and FSH are required for follicular development and
MenstrualCycle #OvarianCycle ... #menstruation #endocrinology
Menstrual Cycle Physiology: Ovarian Cycle – Ovulation Explained

Around Day 14, estrogen exerts sudden +++ positive feedback
MenstrualCycle #OvarianCycle ... pathophysiology #Ovulation #endocrinology
21-Hydroxylase Deficiency (21-OHD): Pathogenesis and Clinical Findings
Autosomal recessive mutation in CYP21A2 coding for the enzyme 21-OHase
a scrotum #21HydroxylaseDeficiency ... pathophysiology #genetics #endocrinology
Menstrual Cycle Physiology: Ovarian Cycle – Luteal Phase Explained
 • The LH surge can be thought
MenstrualCycle #OvarianCycle ... #LutealPhase #endocrinology
Menstrual Cycle Physiology: Correlating the Ovarian and Uterine Cycles
Note: Some charts show different relative levels of
MenstrualCycle #OvarianCycle ... pathophysiology #comparison #endocrinology
Menstrual Cycle Physiology: Ovarian Cycle – Follicular Phase Explained
Early Follicular Phase (Days 0-5)
 • Granulosa cells
MenstrualCycle #OvarianCycle ... FollicularPhase #endocrinology
Menstrual Cycle Physiology: the Uterine Cycle
The endometrium has receptors for ovarian hormones! Changes in structure and
MenstrualCycle #OvarianCycle ... #UterineCycle #endocrinology
Graves’ Disease: Pathogenesis and Clinical Findings
B & T lymphocyte mediated autoimmunity attack TSH receptor -> Continuous
pathophysiology #endocin #endocrinology
Primary Hyperthyroidism - Pathogenesis and Clinical Findings

Note: Although rare, gestational diseases can lead to thyrotoxicosis due
Hyperthyroidism #endocrinology
Feedback Loop: Prolactin (PRL)
 • PRL levels exhibit diurnal, menstrual, and age-related variation
 • TRH has
#FeedbackLoop #endocrinology