G Investigators began a study in 2017 to evaluate the association between infertility treatment and ovarian cancer occurrence among 3,000 Rhode Island women treated for infertility between 1995 and 2014. Cancer incidence was determined by linking the women who had infertility treatment between 1995 to 2014 to the Rhode Island Cancer Registry, which had records of cancer cases in Rhode Island between 1995 to 2016. The cancer rates in this sample were compared with cancer rates among the population of Rhode Island women. What type of cohort study is this? Group of answer choices

Retrospective

Prospective

Both of the above

Neither of the above