Wearable device for monitoring one or more vital signs of a human body of a preterm baby, the device comprising a carrier suitable for being worn around an abdominal part of the body, wherein the carrier is a belt, and an electrode arrangement comprising a plurality of conductive electrodes, wherein the electrodes are arranged on the carrier such as to be brought in contact with a skin of the body in use, and wherein the electrodes are arranged for receiving electric physiologic signals from the body for enabling monitoring of a membrane potential of one or more muscles in the body, wherein the electrodes comprise one or more first electrodes arranged on the carrier such as to be in contact with a side part of a torso of the body, such as to receive via said first electrodes a first electrical signal indicative of a membrane potential of a thoracic diaphragm of the body; and wherein the carrier further comprises at least one second electrode in addition to the one or more first electrodes, the at least one second electrode being arranged on the carrier such as to be in contact with a mid front part of the abdominal part of the body, and such as to be aligned with the one or more first electrodes, the at least one second electrode thereby being arranged for receiving a second electrical signal indicative of one or more further electric physiologic signals from the body, for enabling filtering of the first electrical signal using the second electrical signal for enabling electromyography of the thoracic diaphragm, the wearable device characterised in that the belt has a length within a range of 100 to 500 millimeter, such as to fit around the abdominal part of the body of the preterm baby, the carrier comprises a stretchable material, the one or more of the conductive electrodes comprise a layer of conductive material deposited on the stretchable material, and the one or more of the conductive electrodes are arranged on the carrier such as to protrude out of the carrier, for providing in use said contact between the skin and the electrode or electrodes. wherein the electrodes comprise one or more first electrodes arranged on the carrier such as to be in contact with a side part of a torso of the body, such as to receive via said first electrodes a first electrical signal indicative of a membrane potential of a thoracic diaphragm of the body; and wherein the carrier further comprises at least one second electrode in addition to the one or more first electrodes, the at least one second electrode being arranged on the carrier such as to be in contact with a mid front part of the abdominal part of the body, and such as to be aligned with the one or more first electrodes, the at least one second electrode thereby being arranged for receiving a second electrical signal indicative of one or more further electric physiologic signals from the body, for enabling filtering of the first electrical signal using the second electrical signal for enabling electromyography of the thoracic diaphragm, the wearable device characterised in that the belt has a length within a range of 100 to 500 millimeter, such as to fit around the abdominal part of the body of the preterm baby, the carrier comprises a stretchable material, the one or more of the conductive electrodes comprise a layer of conductive material deposited on the stretchable material, and the one or more of the conductive electrodes are arranged on the carrier such as to protrude out of the carrier, for providing in use said contact between the skin and the electrode or electrodes.