21.   Puberty, heredity, hormonal changes, stress, anxiety and climate are more likely factors.

22.   Premenstrual syndrome and postpartum depression are examples of how hormonal changes can affect mood.

23.   She says it is not necessarily accurate to attribute depression to hormonal changes.

24.   Stress, other illnesses, physical trauma, emotional trauma, and hormonal changes may all trigger the symptoms of fibromyalgia.

25.   Studies have shown that most boys who develop migraines will outgrow them, while unfortunately, the frequency of migraines may increase in teen-age girls due to hormonal changes.

26.   The exact causes of PPD remain unknown, but experts believe hormonal changes play a role.

27.   The hormonal changes she has reported may offer such an explanation, she said.

28.   The hormonal change would in turn suppress or enhance the expression of existing genes, resulting in, for instance, the much larger head of soldier ants.

29.   The males of some species dote on their offspring and, like their mates, undergo hormonal changes in preparation for the birth.

30.   The most common causes of pelvic muscle weakness are childbirth, surgery, injury or hormonal changes during menopause.