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.
The geography of La Primavera is predominantly flat as part of the Orinoquia region in the Llanos plains. The region is crossed by numerous rivers affluents of the Meta River basin. The municipality has a total area of 98,970 kmÂ² and the seat of the municipality covers an area of 54,789 kmÂ².