More than a quarter of the world's nations have sexist laws on nationality, such as stripping women of citizenship if they marry a foreigner, that can deprive women of access to jobs, education and other benefits available to men, a new study says.

The discriminatory laws range from forcing women to give up their acquired citizenship if they are divorced or widowed or denying children the citizenship of their mother, said the report released Monday by Equality Now, an international human rights organization.

"Sex discrimination persists in nationality and citizenship laws in over 50 countries around the world, continuing to trap women and their families in a web of sexist nationality laws," the report said.