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 salient cause of the Civil War was the conflict between slave and free states over the future of slavery in the United States. The conflict was kept from boiling over in the early decades of the 19th century because of political compromises and a rough equivalence between the numbers of slave and free states.