1 The results of prophylactic measures for femoral head AVN have considerable variation, but certain generalizations can safely be stated. 2  Namely, the clinical results of core decompression alone deteriorate with more advanced lesions.
1 Melasma is very common skin ailment. It can occur to anyone, but young women with brownish tone are more likely to contract with it.  The condition is often linked with female hormonal changes. Change in level of estrogen and progesterone may cause melasma.
Research into one form of depression â seasonal affective disorder (SAD) â has uncovered another potential factor in mood disorders: an internal body clock that has gone awry. Experts don't fully understand the cause of SAD, but a leading theory has been that the hormone melatonin plays a role.