***natural birth*** can be called as the first method of **birth** and the birth of the fetus, which is used from the past until now....birth means the natural birth of a baby through the mother's womb without the need for surgery...they avoid natural birth....this is despite the fact that according to gynecologists and obstetricians **natural birth is the best method..obstetrician and gynecologist in Tehran** Dr. Zahra Saifi for advice and selection...of course, in some cases according to the condition of the pregnant mother and the position of the fetus In the uterus and cases like this, it is not recommended according to the diagnosis of the obstetrician and gynecologist, and the baby must be born by caesarean section.. so that you can have a more open view about the choice of delivery method.. In **natural birth**, the mother notices the time of labor when the pain begins. it is painful)... the fetus is placed in the mother's stomach, the head of the fetus is down so that the delivery can be done easily....