11123 Background: For the 10% of women diagnosed with cancer in the reproductive age, reproductive health (RH) is a critical component of oncologic survivorship. RH includes oncocontraception (OC), oncofertility (OF) and sexuality. Guidelines segregate these components resulting in fragmented reproductive health care management. Methods: The EROS trial is a clustered randomized trial performed at 17 NCI Community Oncology Research Program (NCORP) sites (including 8 NCORP sites and 9 Minority/Underserved NCORP sites) from 2016-2023. Eligible subjects included reproductively capable women aged 15-55 with new cancer diagnosis. Intervention included RH didactics and decision aids. Childbearing interest was dichotomous, not completed childbearing (including either pregnant or future childbearing interest) or completed childbearing. The objective of this study is to determine provision of OC and OF referral by providers at the baseline visit based on patient’s self-reported childbearing interest at study entry. Chi-square tests were used to compare distribution differences in the referral status (receipt: yes vs. no) between treatment arms. Results: The EROS study enrolled 420 subjects. Of the 63.6% (267/420) completed childbearing, 62.4% (58/93) in the intervention arm and 40.2% (70/174) in the non-intervention arm received an OC referral (p=0.0006), whereas 98.9% (92/93) in the intervention arm and 93.7% (163/174) in the non-intervention arm received an OF referral (p=0.0487). Of the 36.4% (153/420) not completed childbearing, 48.3% (28/58) in the intervention arm and 33.72% (32/95) in the non-intervention arm received an OC referral (p=0.0729), while 77.6% (45/58) in the intervention arm and 70.5% (67/95) in the non-intervention arm received an OF referral (p=0.3388). Conclusions: While the intervention increased the rates of provision of oncocontraception and oncofertility for patients with completed childbearing, our study shows provision of oncofertility referrals at a markedly higher rate than oncontraception. Referral patterns were inconsistent with patient need particularly in completed (receiving OF referral) or delayed childbearing (not receiving OC referral) interest of the patient. The bias favoring oncofertility referral may reflect oncology guidelines emphasizing this aspect of reproductive health despite comprehensive needs of patient.

EROS: Engendering reproductive health within oncologic survivorship—ECOG-ACRIN E1Q11 paradoxical provision of reproductive health.