The natural sciences book addresses subjects such as masturbation and sexual orientation.

The education ministry says the book has been in use from 2004 but these topics "generating controversy in society" will no longer be taught.

Teaching issues on sexuality to young people is for some communities in Mozambique being considered a taboo.

Some also believe that sex education for children at this age group may promote premature marriages and early pregnancies.

The book will be replaced next year but the education ministry has urged schools "not to address these issues".

"We talked to the publisher to remove that page", said Ismael Nheze, the director of the National Institute of Education Development.