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.
In 1498, Columbus reached one of the estuary branches of the Orinoco, and it is believed that members of the Spanish expedition of A. de Ojeda and A. Vespucci saw one of the Orinocoâs branches. In 1531 the Spanish conquistador Diego de Ordaz first navigated the Orinoco to its confluence with the Meta River.n 1498, Columbus reached one of the estuary branches of the Orinoco, and it is believed that members of the Spanish expedition of A. de Ojeda and A. Vespucci saw one of the Orinocoâs branches. In 1531 the Spanish conquistador Diego de Ordaz first navigated the Orinoco to its confluence with the Meta River.