Hi thanks for your question.
Menorrhagia that is irregular bleeding is common after
tubal ligation.Disturbence (delayed or
irregular periods) in your menstrual cycle could be because of tubal ligation.The other reason for delayed periods could be anxiety (tension).Chances of
pregnancy as a cause for delayed periods are very very less but cannot be ruled out altogether as failure of tubal ligation do occur but very rarely.Best way to rule out pregnancy as a cause of delayed periods is to go for pregnancy test.
Hope this answers your question.