Only logical way to do space travel efficiently; to send people out of the earth fast enough, and to populate other planets with enough people to guarantee cove

Only logical way to do space travel efficiently; to send people out of the earth fast enough, and to populate other planets with enough people to guarantee covering the loses by accidents (that will happen) and protection from endogamy problems. Another interesting question (filosophically, biologically and morally) is if artificial wombs could break the boundaries of human pregnancy. Currently is subject to the capability of the body of the mother to sustain a successful parturition without bursting (sorry for the ugly mental image but is like that). The babies can't grow indefinitely inside the mother. Artificial wombs don't have this constrain. Could this machines extend it for a whole space travel of 1 year, or 1,5 years, or even more, so this children are much more apt to fend for themselves when born? nobody knows.