Female infertility is due to a range of factors
Due to the complexity of the reproductive process, many more things can go wrong with the woman than with the man. but in terms of number the frequency of infertility are about the same in the man and the woman.
The woman is responsible for the production of the egg?, the migration of the egg, the proper implantation? of the egg in the womb?, the development of the embryo?, and, of course, whether the egg is able to be penetrated by a sperm? at all.
Like all fertility aids, DuoFertility can be very useful in certain cases of infertility and less so in others.