1 In contrast, Preseedâs osmolality matches that of semen and thus does not harm or damage sperm.  Viscosity â The texture of many vaginal lubricants also negatively affect fertility by inhibiting the sperm from traveling up the vagina and through the cervix quickly and efficiently.
The Civil War in Sudan was caused by religious tensions between the North and the South. The two main religions are Sunni Muslim (North) and Christians or other traditional beliefs (south).
The causes of conflicts in Africa are numerous, interconnected and interrelated, ranging from individual to group violation, to structural inequality and injustice. Some causes of conflicts in Africa are local while others are the result transformations in the international structure since the end of the cold war. Continuing economic decline and material insecurity are accompanied in many countries in Africa by increase in political instability and conflicts.