A.W.
I was at CLC (Certified Lactation Consultant) training about 2 months ago, and the lecturers stated that you can not get pregnant & will not get a menstrual period until the baby starts going longer periods of time between feedings (4+ hours). They used the example of when the baby starts sleeping through the night. The CLC lecturers base the training of science based evidence. But I agree with the other mothers and I myself added my own protection. I hope that I helped a little.