People often fear that having more children will make them poor. In reply to that, the Qur'an says:
Do not slay your children for fear of poverty. We shall provide for them and for you (Qur'an 17:31).
Even in a case where one is already poor, the Qur'an insists that Allah will provide sustenance for us and for our children, and furthermore that Allah has made human life sacred (see Qur'an 6:151).

The right to life is God-given. No human should take away that right. The general rule, therefore, is that abortion is not permitted in Islam. However, Islam is a very practical religion. It includes principles to deal with exceptional cases. One such principle is that when a pregnancy threatens the life of the mother, an abortion may be performed. Although the lives of both mother and child are sacred, in this case it is better to save the principal life, the life of the mother. Even in this case, it would be better if the abortion is done before the foetus is 120 days old, for that is when the soul is breathed into the foetus. Islam does not permit abortion in other cases.

Women who have been victims of rape or incest naturally deserve sympathy and help. But a child conceived in this unfortunate manner still has a right to live. Of course this places an unwanted burden on the mother, but killing the child is not the right solution. To understand this point better, suppose someone sees the poorer sections of society as an unwanted burden on the rich. Would it be right then to kill off all the poor? Of course not. Why then should anyone decide that a child should be killed just because they are an unwanted burden? Society as a whole should help such a mother and relieve her as far as possible. But the child should not be killed.