Doctors on Wednesday will examine a 10-year-old girl raped by her uncle, as India's top court considers whether she should be allowed to have an abortion despite strict laws.

The girl's parents went to the Supreme Court after their appeal to abort the 26-week foetus was rejected by a lower authority, despite warnings that her body was not ready for childbirth.

Indian law does not allow medical terminations after 20 weeks unless there is a threat to the mother's life. But the Supreme Court agreed to hear the appeal, ordering doctors to conduct a medical examination and report back before a ruling is given on Friday.

The girl's pregnancy was only discovered recently after her parents took her to a hospital when she complained of stomach pain.

Indian courts have considered many pleas from rape victims seeking permission to terminate pregnancies following abuse.

In many cases, the women only discovered they were pregnant when late in their term.

In May, the top court allowed a 10-year-old rape victim from the northern state of Haryana to abort her nearly 21-week foetus.

India has a grim record of sexual assaults on minors with 20,000 cases of rape or sexual assaults reported in 2015, according to government data.

A UN Committee on the Rights of the Child in 2014 said that one in three rape victims in India was a minor and expressed alarm at the widespread sexual abuse of children.

Almost 50 per cent of the abusers are known to the victims.

Sex — whether consensual or otherwise — with a person aged below 18 is considered rape in India.