Fertility and Pregnancy-Related Issues in Young BRCA Carriers with Breast Cancer

Approximately 10% to 15% of breast cancer cases in young women are diagnosed in patients harbouring germline (g) pathogenic or likely pathogenic variants (PVs) in the BReast CAncer 1 ( BRCA1 ) or BReast CAncer 2 ( BRCA2 ) genes. Preclinical and clinical studies showed a potential negative effect of germline BRCA 1/2 (g BRCA1/2 ) PVs on ovarian reserve and reproductive potential, even before starting anticancer therapies. The aim of this article is to summarize the current literature on the fertility potential of young g BRCA1/2 PVs carriers with breast cancer and the risk of gonadotoxicity associated with anticancer treatments. Moreover, we describe the available evidence on the efficacy of fertility preservation techniques in young g BRCA1/2 PVs carriers and the safety data on having a pregnancy after breast cancer treatment.