What age group is eligible for one breast cancer screening mammography before turning forty?

The age group eligible for one breast cancer screening mammography before turning forty is specifically designated as being at least 35 but less than 40. This guideline reflects the understanding that women in this age range may have individual risk factors that warrant earlier screening than the general recommendation, which typically begins at age 40 for average-risk women.

Screening guidelines often acknowledge various factors such as family history and genetic predisposition, which can influence when a woman should begin screening. Therefore, this specific age group allows for proactive monitoring and early detection opportunities.

In contrast, the other age options do not align with these guidelines, particularly given the absence of specific screening recommendations for women under 35 and the fact that women who are at least 40 are usually recommended to have annual screenings rather than just one prior to age 40.