Theoretically, in vitro fertilisation could be performed by collecting the contents from a woman's fallopian tubes or uterus after natural ovulation, mixing it with sperm, and reinserting the fertilised ova into the uterus.
Upstream operations deal primarily with the exploration stages of the oil and gas industry, with upstream firms taking the first steps to first locate, test and drill for oil and gas. Later, once reserves are proven, upstream firms will extract any oil and gas from the reserve.
LINK / CITE ADD TO WORD LIST. adjective. The definition of downstream is in the same direction that the current of water flows. When a piece of driftwood is moving left and the current of the water is moving left, this is an example of a time when the driftwood is moving downstream.INK / CITE ADD TO WORD LIST. adjective. The definition of downstream is in the same direction that the current of water flows. When a piece of driftwood is moving left and the current of the water is moving left, this is an example of a time when the driftwood is moving downstream.