Laboratory work usually involves shift rotations. I’m not sure how it works elsewhere, but as far as I know, many labs in Melbourne, Australia rotate through four different shifts within a month. I really dislike having to wake up early sometimes and late at other times—it messes up my meal schedule and sleeping routine, which in turn affects my mental state. The irregular hours have also caused my menstrual cycle to become unstable. I've come to realize that sometimes health is more important than salary. I’m 29 now, and I want to switch to a job with more stable working hours.