'pregnancy-related' originates from the combination of 'pregnancy' and 'related', where 'pregnancy' comes from Latin 'praegnans', meaning 'with child', and 'related' comes from Latin 'relatus', meaning 'brought back'.

'pregnancy' changed from the Latin word 'praegnans' to the Old French 'pregnant', and eventually became the modern English word 'pregnancy'. 'Related' evolved from the Latin 'relatus' to the Old French 'relater', and eventually became the modern English word 'related'.

Initially, 'pregnancy' meant 'with child', and 'related' meant 'brought back'. Over time, 'pregnancy-related' evolved to mean 'pertaining to pregnancy'.