US President Donald Trump's administration has finalized a regulation rolling back Obama-era protections for transgender Americans against sex discrimination in health care, The Guardian reported.

According to the new version of the policy, the Department of Health and Human Services will be “returning to the government’s interpretation of sex discrimination according to the plain meaning of the word ‘sex’ as male or female and as determined by biology”.

Based on the regulations adopted by the Obama administration, gender was defined as the person’s internal sense of himself as a man or woman, or neither of the two definitions.

"The policy shift, long sought by Donald Trump’s religious and socially conservative supporters, would allow healthcare providers and insurance companies that receive federal funding to refuse to provide or cover transition-related care for trans Americans," The Guardian wrote.

A number of human rights organizations have already stated that this decision will be challenged, including in the courts.