Parents' visa appt date

[hellosrpm]

My son went for H4 visa. He got blue slip. They asked him to bring labor certificate and asked me to in come in person over to India.My Parents' have visitor visa appt in Nov first week.I can go to India only in Dec to get visa for my son.
Do I need to reschedule my parents' appt after Dec or Shall they go in Nov first week as scheduled originally.If they go in Nov first week, will there be any problem in getting visa for them as my son's visa is pending.Please let me know.I really appreciate your help

[immihelp]

Those are 2 independent things. One should not have effect on another.