The present invention relates to a WHS item of clothing for a baby, said WHS item of clothing being configured for detection of vital parameters of the baby, said WHS item of clothing comprising a first portion adapted to at least partially cover the torso of the baby and at least one sensor for detecting a vital parameter of the baby. It is characterized in that it comprises at least one second portion extending from the first portion, said second portion being adapted to at least partially cover one arm of the baby, said at least one second portion having a section that can be stretched in at least one direction, said stretchable section being designed to remain in a fixed position of said at least one arm; said at least one sensor being coupled in said stretchable section to be properly positioned relative to the baby's arm, to provide an electrical output signal indicative of the vita parameter being detected; a connecting cable operably connected with said at least one sensor to transmit said electrical signal to a data collection unit.