Natural progesterone is a hormone that occurs naturally in a woman's body. It is usually supplied in a cream, but is also available as a suppository. Natural progesterone is not the same as the synthetic progestogens or progestins prescribed by doctors and used in contraceptives. (These synthetic hormones may actually cause depression in some people.)
There is a huge drop in a mother's progesterone levels after she gives birth to her baby. Progesterone levels also fall in the days before a woman has her period and at the time of menopause. It is thought that taking natural progesterone may help women who have experienced these hormonal changes by increasing the amount of serotonin in the brain.
The only study of the effect of natural progesterone on women with depression was carried out with 10 mothers with post-natal depression. Progesterone was not effective. However, there were serious problems with the way the study was designed. Better studies are needed before we can decide if progesterone is useful for post-natal depression.
There are no scientific studies of the effect of progesterone on women with depression near or after menopause. Nor are there any studies of the effect of progesterone for women with depressive symptoms just before their period. However, research has consistently shown that natural progesterone does not improve mood in women suffering from pre-menstrual syndrome in general.
Natural progesterone may affect the timing of a woman's period.
Natural progesterone can be obtained through a naturopath and is also sold over the internet.
Given the lack of scientific evidence, natural progesterone cannot currently be recommended for depression.
Last reviewed and updated: 1 February 2006