This might be a silly question but-

Ive always had a 'normal' menstrual flow, of heavy-medium-light bleeding lasting 5-7 days. However ever since I had my DD my flows have been noticablly lighter & shorter. They never really start of heavy like it used to instead its a medium-light flow lasting around 3 days max. So my question is, is there any correlation between menstrual flow and ability to conceive? I guess I am thinking if there is less bleeding would that therefore mean less lining on my uterus in which implantation can occur?