Some schools in Northern Ireland are teaching pupils that homosexuality is wrong in relationships and sex education (RSE).
A Northern Ireland Human Rights Commission (NIHRC) report said "many schools use language that shames and stigmatises young people" who had sex.
Some told pupils that those who "engage in casual sex must bear the consequences of their actions".
The NIHRC investigated schools policies on the teaching of RSE.
The detailed investigation found most schools were not providing "age-appropriate, comprehensive and scientifically accurate education on access to abortion services".
"Some schools actively contributed to the shame and stigma surrounding unplanned pregnancy and abortion, by making statements such as 'abortion is not a means of contraception and those who knowingly engage in casual sex must bear the consequences of their actions'," the NIHRC report said.
