The purpose of this series is to highlight a range of rare health conditions. Rare health conditions are those that affect no more and usually less than 1 person in every 2000 and many HCAs and nurses will encounter some of these conditions, given the high number of them. This 27th article will explore one of these conditions—Mayer-Rokitansky-KüsterHauser syndrome—and the role and support needs of the ‘informal’ family caregiver.