Both men and women can be affected by a loss of libido from time to time. Women who are pregnant or shortly after childbirth may find their desire lacking but it should only be a temporary hormonal problem that will solve itself once the hormones get back in balance.
Women libido problems can however become an important issue in a happy marriage if she cannot eventually get back in the mood. Male impotence is also of concern if he finds the lack of sexual satisfaction is no longer important. Many of the herbal and natural sexual supplements act by improving blood flow.