THanks for the query
Levels of 430 to 750 is considered normal
U r suffering from hypoprolactinemia but this exactly is not known to cause infertility
issues but none the less it should be considered as one of the causes of nothing else could be isolated.
Treatment is available, u will have to go to an endocrinologist
and he might prescribe u Carbagolin tablets to be taken for sometime/life long
Have a healthy life