SEX education for Glasgow school kids is to start at four-years-old as part of a drive to improve understanding among the city's youngsters.
Pupils will learn the names of organs, including genitalia, in primary one making them the youngest in Scotland to begin sex education.
From primary two youngsters will learn about reproduction in animals.
Sexual health and relationships will continue to be taught throughout the pupils' time at school.
The programme concludes in primary six, with classes on sexually transmitted infections, including HIV and AIDS.
The lessons will be introduced in non-denominational schools in Glasgow after a pilot scheme.
City council officials said the scheme had received "overwhelming support" from pupils, parents and teachers.
Deputy leader James Coleman said: "This isthe first curriculum to give pupils a comprehensive sexual health andrelationships education throughout their school careers."
Youngsters will be taught about emotions,friendships, self-esteem and respect as well, as physical developmentand sexual health.
From primary five, pupils will learn about puberty and, in year three, they will learn about contraception.
Education chief Maureen McKenna said:"Topics and issues are introduced at an appropriate age and handled inan appropriate way."