Depo Provera is considered a very effective method of birth control. If taken every thirteen weeks, it is estimated to be 99% effective. It does not, however, protect a woman from STDs. Studies indicate that women on Depo have a decreased risk of ovarian cancer, Pelvic Inflammatory Disease, and Endometrial Cancer.
The Orinoco is one of the longest rivers in South America at 2,140 kilometres (1,330 mi). Its drainage basin, sometimes called the Orinoquia, covers 880,000 square kilometres (340,000 sq mi), with 76.3 percent of it in Venezuela and the remainder in Colombia.
Largest Alluvial Plain of the World. The Great Plain of North India also known as Indo-Gangetic-Brahmaputra Plain is the largest alluvial plain of the world. This arcuate plain extends for a length of 3200 km from the mouth of the Indus to the mouth of the Ganga. The plain lies partly in Pakistan and partly in India. The length of the plain in India is around 2400 km. The average width of the plain varies from 150 to 300 km.