Couch potatoes were also about 50 percent more likely to die of any cause during the four-year study.
Researchers are aware that a similar four-year study led by the United Nations Aids group on another gel, was unsuccessful.
Under a four-year study, one third of the women will be given the gel, one third a placebo and one third will not receive any, while all will be given condoms and taught about their use.
They found that women with once-a-week-migraines with auras -- who made up 5 percent of the women with migraines -- were four times as likely to have had a stroke during the 12-year study as women without migraines.
CNN: Women's migraines linked to higher stroke, heart attack risk
The pilot's success was astounding: 24 of the 27 seniors in the study were accepted into four-year colleges.
She'll finally get her associate's degree in May, and then she plans to move on to a four-year school, the University of Central Florida, to study forensics.
At the start of this year, he produced a study calling for either a four-runway hub airport on a new site in the estuary or increased capacity at existing airports nearby, such as Gatwick or Stansted.
Also, for most areas of study, an associate degree puts you halfway toward a four-year degree should you decide to pursue one at a later time.
In 2003 mutual fund tracking firm Morningstar conducted a study that broke the 20-year period of 1976-2002 into five four-year segments.
An Advertising Age study from 2003 showed that only 23% of Wal-Mart shoppers had a four-year college degree.
WSJ: Rich Karlgaard: Wal-Mart's Sales Problem��And America's
Speaking on Radio Four's Today programme, 17-year-old student Tomos Dafydd claimed he had applied to Bristol to study politics but had been told his A-level in Welsh was not "relevant or useful" to the degree.
The study, published in The Lancet, looked at 59 women who had two children within a four-year period.
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