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).
Image caption South Sudan's civil war has left a third of its population in crisis. At least 30,000 people are facing starvation in South Sudan, the UN has said. Three UN agencies warned that a famine could develop in southern Unity State, where fighting has prevented deliveries of humanitarian aid.