The two primary biological factors that have been explored are derived from genetics and hormone theories. The X-link hypothesis states that the genetics material that predisposes an individual for depression is located on the X chromosomes. Consequently, women have a larger chance of receiving a depression-prone X chromosome than men and all daughters of a depressed father and non-depressed mother should be depressed (Ernest and William 543). As a result, men just have few effects according to the genetics theory.
It has been said that compared to men, women experience some tidal hormones levels such as estrogen, estradiol, progesterone, and FSH (follicle-stimulating hormone) during some special periods in life can cause depression. These changes may affect mood and susceptibility to depression (Dennis and Charles 148) and will be
References: Beckham, Enerst and William Leber. Handbook of Depression. 2nd ed. New York: The Guilford Press, 1995. Rosenthal, M.Sara. Women & Depression. Los Angeles: Lowell House, 2000. Charney, Dennis and Charles Nemeroff. The Peace of Mind Prescription. New York: Houghton Mifflin Company, 2004. " Women and Depression" University of Michigan Depression Center. 2003-2008 <http://www.depressioncenter.org/understanding/women.asp>