How long!!

carmen_mingo2010

So im posting for someone i know, she has a 4 yr old son shes 27 years old ever since she had her son shes been on depo shot, she was supposed to get it again on oct 7th but never did she doesn't want it anymore she wants another baby shes been having lots of sex...she told me if it will take her a long time to get pregnant so i told her it might cause shes been on depo for 4 years now, is there anything she could take to try to get pregnant little faster? Should she start using opks? And prenatal vitamins?

Her 4 year old son

And connie marie shes 27 and ready for another baby! Any advice for her,