Sex specifics when trying to conceive. (Kind of TMI but no images)

Hi all!

Kind of TMI!! I was wondering if anyone had any input regarding if the depth of the penis during ejaculation significantly affects odds of conception. I asked my fiancé if he was as far as he could go inside when he ejaculated, and he said he was probably 70% inside. Does anyone think it makes a difference? We are trying to conceive and I want to maximize our odds!