There was no positive effect of taking a break for light users.
Only three trials looked at the effect of taking antioxidants on live birth rates, making the findings extremely tentative.
The latest study looked at the effect of taking folic acid - the synthetic form of vitamin B9 - before conception.
It had the effect of taking Britain into what turned out to be a botched invasion with appalling consequences.
What complicates them is that they may also have the effect of taking away the bargaining leverage of less powerful parties in a dispute.
If it is allowed to drag on, early successes might have the perverse effect of taking enough pressure out of the system to undermine further reforms.
If the real effect of taking nearly £14bn off the projected welfare budget was to get the unemployed back into the workplace, it would be an admirable project.
In his new book, "The End of Oil," Paul Roberts says conservation in the 1970's and 80's, by driving down energy prices, had the unintended effect of taking away incentives to use less.
Allusiveness so generous has the effect of taking our mind down side roads, wondering what unastonishing debauched looks the witness has seen, and exactly when a bygone gangster style was chic, and whose heart is breaking.
WPP is expected to mitigate the financial effect of taking on more debt with sales of the noncore Cordiant assets, including agencies in Australia and Germany, and the new share placement, said Trevor Pritchard, an analyst with Standard & Poor's.
Even though captopril came on the market 25 years ago, until now there was hardly any information on the effect of taking ACE inhibitors in the first trimester, and they were thought to be safe.
