The entire contents of the Tropical Journal of Obstetrics and Gynaecology are protected under international copyrights The Journal  however  grants to all users a free  irrevocable  worldwide  perpetual right of access to  and a license to copy  use  distribute  perform and display the work publicly and to make and distribute derivative works in any digital medium for any reasonable non-commercial purpose  subject to proper attribution of authorship and ownership of the rights