The responsibilities and anxieties of government unassisted by parliament, and the continued struggle against the force of anarchy, weighed upon him and exhausted his physical powers.
Roosevelt. The 32nd president of the United States was struck by polio as a child and never walked unassisted again.
In extreme circumstances, you may have to have an unassisted home birth.
You might also have an unassisted birth if you are in an unreachable place, such as on a boat, an island, airplane, or otherwise cut off from society in some way.
It is certainly scary to have a very quick and unassisted labor and childbirth, but remind yourself that your child and you, are, according to the statistics, likely to come through the event healthy and happy.