Answer: Remain the same.
Explanation: Since the same amount of children are born as deaths occur on the earth, the population would remain the same. But there are billions of women in the world, so it will never decline. Since many young girls become women over the years, and have their own children, and those children (Girls) will grow up and have children, and it keeps on going. So the population would be as it is today, where people die at the same rate children are born.