Actually, there is no scientific research that confirms this theory. What has been shown, however, is that a woman is likely to get pregnant after having tubal ligation through laparotomy (during a C-section), vaginal delivery or laparoscopic surgery.
Read the full article on: What is tubal ligation? – Advantages and consequences ( 84).

Sara Salgado
B.Sc., M.Sc.
Embryologist
Degree in Biochemistry and Molecular Biology from the University of the Basque Country (UPV/EHU). Master's Degree in Human Assisted Reproduction from the Complutense University of Madrid (UCM). Certificate of University Expert in Genetic Diagnosis Techniques from the University of Valencia (UV).