What is the ruling on using the douche that women use to clean their private parts?

Firstly: 

We praise
Allah for having guided you to Islam, and we ask Him to make you steadfast
in adhering to His religion and to increase you in faith, certainty and
guidance, for He is All-Hearing, Ever Near. 

Secondly: 

There is
nothing wrong with using the douche mentioned in principle, but that is on
condition that it be free of haraam substances, such as pork fat and the
like. 

It is also
stipulated that it should not be harmful to the one who uses it, or affect
the foetus if she is pregnant. There has been a great deal of talk by
specialists about the douche that is used for cleaning the front passage, in
that using it regularly leads to changes in the pH balance in that place; it
also leads to an increase in local infections and leads to a greater risk of
pelvic infections. It is regarded as one of the causes of increased
secretions, changes in secretions and irritation, as well as other harmful
effects. So you should refer to a trustworthy doctor concerning that. 

And Allah
knows best.