delicate adjective▶ in a delicate state of health; in a delicate condition pregnant UK,1850 Now rare, but still understood.
In 1835, when Marie Taglioni found herself pregnant [...], the ballerina superstar was obliged to fake a knee injury to explain her disappearance from the stage. For years afterwards, un mal au genou was the euphemism used by dancers in the same delicate condition. — Judith Mackrell, TheGuardian, 12 December 2001