IPA: /ˈmɛnstrʊəli/
KK: /mɛnˈstrʊəli/
In a way that relates to the monthly cycle of menstruation.
She experiences mood changes menstrually, often feeling different during her cycle.
Menstrually → It is formed from "menses" (from Latin "mensis", meaning month) and the suffix "-al" (meaning pertaining to). The word "menstrually" refers to something that pertains to the monthly cycle of menstruation.
Think of the Latin word for month, 'mensis', to remember that 'menstrually' relates to the monthly cycle.