This study will help the researchers learn more about factors that affect the decisions about fertility preservation and family building made by young women with breast cancer.

Inclusion Criteria:

• Breast cancer, Stage 0-III
• Female
• 18-45 years of age at time of diagnosis
• Patients that completed their primary breast cancer treatment (surgery, chemotherapy, radiation therapy). Patients can still be on endocrine therapy, trastuzumab and/or pertuzumab therapy.
• Received education and counseling by MSK Fertility Nurse Specialist before beginning cancer treatment from 2009 through 2018

Exclusion Criteria:

• Unable to read English

Women with Breast Cancer Regarding Fertility Preservation before Cancer Treatment.

This is a cross-sectional survey of YWBC who received a pre-treatment consultation with a FNS from 2009 through 2018. Participants will complete a one-time web-based questionnaire examining the decisions they made about FP before and after treatment, the factors that influenced FP decisions, and the ways in which patients pursue FB after treatment.

Memorial Sloan Kettering Cancer Center supports the international committee of medical journal editors (ICMJE) and the ethical obligation of responsible sharing of data from clinical trials. The protocol summary, a statistical summary, and informed consent form will be made available on clinicaltrials.gov when required as a condition of Federal awards, other agreements supporting the research and/or as otherwise required. Requests for deidentified individual participant data can be made following one year after publication and for up to 36 months later. Deidentified individual participant data reported in the manuscript will be shared under the terms of a Data Use Agreement and may only be used for approved proposals. Requests may be made to: crdatashare@mskcc.org.