Amenorrrhea Mechanism- Hypothalamic dysfunction suppressing HPO axis- dec pulse freq of GNRH- dysfunction of LH and FSH -ovarian suppression and low estrogen Mechanism- Hypothalamic dysfunction suppressing HPO axis- dec pulse freq of GNRH- dysfunction of LH and FSH -ovarian suppression and low estrogen Secondary to excessive exercise and/or dieting Secondary to excessive exercise and/or dieting Bullen et al –excessive exercise even without weight loss can cause menstrual irregularities Bullen et al –excessive exercise even without weight loss can cause menstrual irregularities Hormonal changes in athletic women with NL cycles-Shortened luteal phase(dec progesterone), dec LH pulse frequency Hormonal changes in athletic women with NL cycles-Shortened luteal phase(dec progesterone), dec LH pulse frequency
{}