By Jacqueline Bennett newsandviewsjb.com   We have come a long way since a mother worried her daughter ~ with sights on running the Boston Marathon ~ might not find a husband, since New York Marathon officials warned that distance running could cause a woman’s uterus to fall out, and since LIFE magazine ran a headline ~ “Tomboy Out On a Limb” ~ after a woman broke the gender barrier in the 1961 Manchester Road Race in Connecticut.   “The best American women’s field ever assembled for Monday’s annual 26.2 mile trek from Hopkinton to Boston,” as described by sportswriter Lori Riley of the Hartford Courant, will take its mark this morning at the Boston Marathon. No matter what, this field of women would be…