How long before ttc again after ectopic and methotrexate shot?

Amanda • Boy mama💙Gestational Diabetes🍩Ectopic January 2018👼Previous mild hydrosalpinx 💉

Why is it that most doctors have been telling their patients to wait one full cycle before ttc after methotrexate for EP, but all the articles I've read say to wait at least 3 to build up folic acid again? Would like to hear what other doctors recommended for this?