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Menstrual Cycle Physiology: Ovarian Cycle – Brief Overview
LH and FSH are required for follicular development and
- FSH from pituitary ... - LH from pituitary ... theca cells • Ovulation ... not implant #MenstrualCycle ... #menstruation #endocrinology
Menstrual Cycle Physiology: Ovarian Cycle – Ovulation Explained

Around Day 14, estrogen exerts sudden +++ positive feedback
Ovarian Cycle – Ovulation ... on the anterior pituitary ... for clarity) #MenstrualCycle ... pathophysiology #Ovulation ... #endocrinology
Feedback Loop: Growth Hormone (GH)
Growth Hormone:
 • Liver -> GHR activates JAK-STAT pathway -> Incr IGF1
Growth Hormone (GH ... /Symptoms: • GH ... abn lipid • GH ... #FeedbackLoop #endocrinology ... pathophysiology #pituitary
Menstrual Cycle Physiology: The Hypothalamic-Pituitary-Ovarian Axis
Estrogen, when released:
 • Negatively feeds back on the hypothalamus and
The Hypothalamic-Pituitary-Ovarian ... hypothalamus and anterior pituitary ... hypothalamus and anterior pituitary ... #MenstrualCycle ... HypothalamicPituitary #endocrinology
Pituitary Mass Effects - Pathogenesis and Clinical Findings
 • Pituitary turnors are almost always a benign
Pituitary Mass Effects ... Pituitary adenomas ... • For pituitary ... following order; GH ... #SideEffects #endocrinology
Menstrual Cycle Physiology: Ovarian Cycle – Follicular Phase Explained
Early Follicular Phase (Days 0-5)
 • Granulosa cells
production by pituitary ... back on anterior pituitary ... preparing for ovulation ... #MenstrualCycle ... FollicularPhase #endocrinology
Menstrual Cycle Physiology: Correlating the Ovarian and Uterine Cycles
Note: Some charts show different relative levels of
Ovulation • ... See also "Ovulation ... on the anterior pituitary ... #UterineCycle #MenstrualCycle ... pathophysiology #comparison #endocrinology
Menstrual Cycle Physiology: Ovarian Cycle – Luteal Phase Explained
 • The LH surge can be thought
slide) Besides ovulation ... hypothalamus and anterior pituitary ... Ovarian Cycle #MenstrualCycle ... #LutealPhase #endocrinology