Appropriate reproductive health management was determined using the followings: (1) Females that were pregnant or interested in immediate pregnancy (defined as within 1 year of enrollment) were given referral to obstetrician/gynecologist or counseled about pregnancy options (2) Females interested in future childbearing were counseled or given a referral for fertility preservation if requested (3) Females who were not interested in immediate pregnancy were given a referral or counseling to select family planning that was consistent with plans for sexual activity and future childbearing. If a female fell into category 1, 2, or 3, and the appropriate referral occurred within 3 months of enrollment, then appropriate reproductive health management was achieved. For patients with appropriate reproductive health management in place before the baseline visit, they were included in the analysis and counted as having appropriate reproductive health management.

Only eligible patients who were evaluable for the primary endpoint were included in the analysis.

The rating on the importance of fertility maintenance was assessed among patients and the corresponding treating physicians. The rating scale ranges between 1 and 10. Higher scores indicate more importance of fertility maintenance. The difference in rating was calculated by subtracting patient rating from physician's rating.

Patients with both patient rating and physician rating available were included in this analysis.

Patient's reproductive health choices relating to oncofertility, oncocontraception and pregnancy was assessed at baseline and 3 months. Patient's reproductive health status is categorized into the following categories:

• Sextually active & childbearing not completed
• Sextually active & childbearing completed
• Sextually not active & childbearing not completed
• Sextually not active & childbearing completed
• Sexuality unknown & childbearing not completed
• Sexuality unknown & childbearing completed
• Pregnant/Pregnancy in 1 year
• Missing/Unknown

All eligible/analyzable patients were included in the analysis.

Appropriate reproductive health management was determined using the followings: (1) Females that were pregnant or interested in immediate pregnancy (defined as within 1 year of enrollment) were given referral to obstetrician/gynecologist or counseled about pregnancy options (2) Females interested in future childbearing were counseled or given a referral for fertility preservation if requested (3) Females who were not interested in immediate pregnancy were given a referral or counseling to select family planning that was consistent with plans for sexual activity and future childbearing. If a female fell into category 1, 2, or 3, and the appropriate referral occurred within 3 months of enrollment, then appropriate reproductive health management was achieved. For patients with appropriate reproductive health management in place before the baseline visit, they were included in the analysis and counted as having appropriate reproductive health management.

Eligible patients with primary endpoint evaluated were included in this analysis.

Reproductive health-related biomarkers, including follicle-stimulating hormone (FSH), anti-müllerian hormone (AMH), thyroid stimulating hormone (TSH) and Thyroid peroxidase (TPO), were evaluated through blood samples collected at baseline and 3, 6, 12, 24 months.

Sexual function was evaluated using PROMIS sexual function survey brief profile V1.0. All subdomain scores (except for the orgasm subdomain) are expressed as T-scores with a mean of 50 and a standard deviation of 10. A raw summed score is created for each domain. For Global Satisfaction with Sex Life, the raw summed score can range from 2 (endorsed "Not at all" to both items) to 10 (endorsed "Very" or "Very much" to both items). Higher scores indicate more satisfaction/interest/lubrication/discomfort/ability with sex life. Lower scores indicate less satisfaction/interest/lubrication/discomfort/ability with sex life.