Word: succession
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Dates: during 2000-2009
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...Unlike many previous studies, which have looked only at the success rates of individual fresh embryo transfers, this study also considered the cumulative success rate for all embryos created and implanted from a single harvesting of eggs - including those that had been frozen. Researchers found that the total pregnancy rate per egg retrieval was higher when embryos were implanted individually. For each "ovum pickup," the overall pregnancy rate was 38% among women who had elective single-embryo transfers, and 33% among those who had more than one embryo implanted...
...Some of that success can be attributed to improvements in freezing techniques, says Dr. Hannu Martikainen, the study's lead author and the chief physician at the University of Oulu Division of Infertility and Reproductive Endocrinology. "Now we have more and more experience, and we are doing more and more frozen cycles," he says. He points out the importance of not only transferring but also preserving each embryo on its own, which makes it possible to use frozen embryos one at a time rather than in bigger batches. "[If you transfer] three embryos in each cycle, you very soon...
...such data may not always account for the specific factors that help determine success rates, such as the age of the patient and the quality of the embryos. At Stanford's fertility clinic, where doctors can carefully select high-quality embryos by growing them in the lab for five days, until the blastocyst stage, instead of the more usual three days, success rates have been on par, if not higher among single transfers, says Westphal. "When I look at our data, in patients with really good blastocysts, the pregnancy rates were comparable," Westphal says. "The singles were just as good...
...even as doctors increasingly consider elective single-embryo transfer the best practice for many IVF candidates, and as more and more fertility clinics report comparable success rates between single- and multiple-embryo transfers, there is still no rule for all women. Even among the best candidates for IVF, says Westphal, there may be much variation. "People don't realize that there's a range," she says. "One 36-year-old is not the same as another 36-year-old, or someone who has done many, many cycles and has terrible embryo quality is not the same as someone...
Moments later, Interior Minister Malik appeared on local media to hail the operation as a success. Some of the attackers were captured alive, he said, adding, "I can confirm one man, who was caught outside the building when he tried to throw a grenade." The heavy teargassing had slowly pushed the gunmen up to the top floor, where they were holding some 35 police hostages. Malik said the hostages were released and four of the attackers killed. Three of the men were killed by snipers, Rao Iftikhar, a government official, said...