As a part of the same scientific study, Heli Nevanlinna usually deals with the Demography, concentrating on Population and frequently concerns with Environmental health. Many of her studies on Environmental health apply to Population as well. She conducted interdisciplinary study in her works that combined Cancer and Disease. While working on this project, she studies both Disease and Genetic predisposition. Heli Nevanlinna integrates many fields, such as Genetic predisposition and Genotype, in her works. She performs multidisciplinary study on Genotype and Heritability in her works. Heli Nevanlinna merges Heritability with Gene in her study. While working in this field, Heli Nevanlinna studies both Gene and Ovarian cancer. Heli Nevanlinna performs multidisciplinary study on Ovarian cancer and Breast cancer in her works.

Heli Nevanlinna undertakes interdisciplinary study in the fields of Cancer and Ovarian cancer through her research. In her papers, Heli Nevanlinna integrates diverse fields, such as Ovarian cancer and Breast cancer. In her works, she conducts interdisciplinary research on Breast cancer and Cancer. Her work blends Gene and Biochemistry studies together. Heli Nevanlinna applies her multidisciplinary studies on Biochemistry and Gene in her research. Her multidisciplinary approach integrates Genetics and Genetic association in her work. Heli Nevanlinna merges Genetic association with Genetics in her study. She undertakes multidisciplinary investigations into Oncology and Pathology in her work. Heli Nevanlinna integrates many fields in her works, including Pathology and Oncology.