The goal of this observational study is to explore the current situation and needs of adolescent and young adult cancer survivors for cancer-related reproductive health and fertility information. The main questions it aims to answer are:

1. What is the status of sexual and reproductive health knowledge among adolescent and young adult cancer survivors?
2. What is the difference between the educational currently available and needs of cancer survivors? Part of the participants will be interviewed and then others will fill out questionnaires.

Cancer is a major public health problem worldwide. With the development of medical and diagnostic technology, the number of cancer survivors worldwide continues to grow, especially among adolescents and young adults. The global average cure rate for pediatric cancer patients was 52%, and the 5-year survival rates of this population in developed countries were about 80% in recent years. With this trend, more pediatric cancer patients are transitioning into the ranks of adolescent cancer survivors.

The fertility intention is generally strong among adolescent and young adult cancer survivors, more than three quarters of non-fertile cancer survivors have a high desire to have children. However, most of them have an unfulfilled desire to have their own child, which lead to high levels of fertility anxiety. What's more, studies have shown that adolescent and young adult cancer survivors also have a great need for sexual and reproductive health, but relevant forms of health care are rarely existed. Young and adolescent cancer survivors are limited by the age of illness and generally lack regular sexual and reproductive health education in schools. Due to the long and painful cancer treatments, they also have difficulty in obtaining relevant knowledge or reproductive health education from professionals such as doctors or nurses during cancer treatment. The lack of communication between providers of survival care services and between providers and survivors makes the sexual and reproductive health education much more difficult for cancer survivors. Numerous studies have shown that a lack of knowledge about reproductive health leads to increased psychological burden, low quality of life and depression among young cancer survivors. Thus, it is critical to meet the reproductive health literacy needs of young people and adolescent cancer survivors.

China is in the midst of an era of optimized birth and three-child policy, but the fertility policy for cancer survivors is relatively poor. Survival care in China currently focuses on the monitoring, prevention and treatment of delayed physical and mental reactions caused by cancer itself and its treatment in adolescent and young adult cancer survivors. Health promotion, such as sexual and reproductive health, or quality of life for survivors is rarely discussed. To some extent, high-quality, multichannel reproductive health counseling and health education may alleviate fertility concerns for adolescent and young adult cancer survivors and improve long-term quality of life. Therefore, on the basis of continuing to provide long-term care for adolescent and young adult cancer survivors, it is necessary to increase sexual and reproductive health counseling, health education and other services for this population. What's more, providing sexual and reproductive health related knowledge through multiple channels can improve the long-term quality of life for adolescents and adolescents.

Before applying interventions to help adolescent and young adult cancer survivors to access to cancer-related reproductive health information, a study exploring their intention to acquire knowledge and relevant factors must be implemented.

Inclusion Criteria:

• Adolescent and young adult cancer survivors: ①be aged range from 15 to 39, ②have been diagnosed with cancer and completed cancer treatment for at least 6 months, ③be able to read, understand and communicate in Chinese.
• Clinical oncology medical staff: ①are clinician or nurse specialist in oncology, ②the average daily contact time with patients in clinical work is not less than 20% of the clinical working time.

Exclusion Criteria:

• Adolescent and young adult cancer survivors: ①unable to complete communication due to serious mental or physical illness such as deaf-mute, mental illness resulting in unclear consciousness, ②be cancer recurrence or second cancer at screening.

The NCCS defined someone as a cancer survivor from the moment of diagnosis through to the end of life.