New laws banning abortion are are scheduled to take effect in four states – Idaho, Oklahoma, Tennessee and Texas – two months after the U.S. Supreme Court overturned the 1973 landmark Roe v. Wade ruling that established a constitutional right to abortion.  In Tennessee, a law banning abortion after six weeks of pregnancy, which took effect four days after the Supreme Court's ruling, will be replaced by a stricter ban that offers no time window to have the procedure. In Idaho, a new law, which bans abortion at fertilization, will replace one that outlawed the procedure after six weeks.  The National Right to Life Committee, an anti-abortion advocacy group, said in a statement that the new laws "will save the lives of thousands of children" and will continue to "allow abortion to protect the life of the mother as well as her health when there is a serious threat."