Orgasm for women is as natural for a man and as desirable, but it is never as certain. Usually, failure to achieve orgasm is due, above all, to social and psychogenic reasons.
Of the few causes are repugnace for sex, and prudery (Sexually repressive), psychological contribution as well as one of inadequate technique. However, despite of the cause, the one with the lesser need for sex is at risk for a sexual aversion.
This is:
Instead of sex being an experience that they both enjoy together, sex becomes enjoyable only for the one with the greatest need. And it can become a nightmare for the other spouse. In all too many marriages, sacrifice leads to a sexual aversion, which, in turn, leads to no sex at all.
Therefore, women who cannot achive orgasm need professional help. You should consult with your Physician to rule out some conditions such as Multiple sclerosis, pernicious anemia, and genetic causes, which may have the symptom Failure to Achieve Orgasm.
Hope this answers your question!
REFERENCE(S)
1. Dr. Harley, 2006.
How to Overcome Sexual Aversion