BACKGROUND:

Breast cancer represents the main neoplasia in incidence and mortality in women, it can be divided into molecular subtypes (luminal A, luminal B, HER2 and triple negative) having a differential prognosis and survival rates. There is literature that demonstrates the strong association between estrogenic stimulating factors and breast cancer, but the existing differences by molecular subtypes are not clear.

OBJECTIVE:

To review the recent literature and describe the relationship found between molecular subtypes of breast cancer and estrogenic stimulating factors.

METHODOLOGY:

Search in the PubMed and LILACS databases with the MeSH and DeCS terms: breast neoplasms, molecular subtypes, risk factors, reproductive factors, looking for the association between the antecedents of parity, age at first pregnancy and history of breastfeeding with molecular subtypes of breast cancer (luminal A, luminal B and HER2).

RESULTS:

A total of 366 results were obtained, excluding 352 articles when evaluating duplicity, titles and abstracts, articles without relevance to the topic, research protocols and articles that did not study the association of estrogenic stimulating factors with molecular subtypes of breast cancer, resulting in 14 articles.

CONCLUSIONS:

Hormone receptor-positive tumors were found to be associated with older age at first pregnancy, longer time between menarche and first term pregnancy and older age at last pregnancy. Breastfeeding and multiparity were found as protective factors for luminal tumors and pure Her2.

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