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They fertilized with what?

Fields fertilized with human urine yield bigger cabbages.

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1. Scientists discover stage at which an embryonic cell is fated to become a stem cell
   01-10-2007 · EurekAlert!
   Cambridge scientists have discovered the stage at which some of the cells of a fertilized mammalian egg are fated to develop into stem cells and why this occurs. The findings of the study, which overturn the long-held belief that cells are the same until the fourth cleavage (division) of the embryo, are reported in today's edition of Nature.
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2. Male fish turn to cannibalism when uncertain of paternity
   01-19-2007 · EurekAlert!
   A study from the February issue of the American Naturalist is the first to demonstrate that male fish are more likely to eat their offspring when they have been cuckolded during the act of spawning. Moreover, the more males that are present during spawning, the more likely it is that a male will try to eat the eggs when they are laid, as it is less likely that he fertilized them.
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3. Mouse stem cell line advance suggests potential for IVF-incompetent eggs
   02-19-2007 · EurekAlert!
   Researchers have found that mouse oocytes that fail to become fertilized during in vitro fertilization are nevertheless often capable of succeeding as "cytoplasmic donors" during a subsequent cloning step using so-called nuclear transfer. Although the implications for human eggs are not yet clear, the findings are of interest because of the ethical and practical concerns surrounding the need for fresh human oocytes for similar nuclear-transfer procedures using human cells.
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4. The cost of keeping eggs fresh for mother cockroaches
   02-26-2007 · EurekAlert!
   Tiny multiple sperm can be long lived, while large "expensive" eggs degenerate quickly if they are not fertilized. This conundrum -- there should be selection for females to keep their eggs fresh until they are used -- has recently been studied in a cockroach where some choosy females have genes that allow them to maintain eggs while looking for the best mate. Perhaps, however, these genes are limited because they are harmful in some environments.
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5. First baby is born after oocytes were matured in the lab and frozen
   07-02-2007 · EurekAlert!
   The first baby to be created from an egg that had been matured in the laboratory, frozen, thawed and then fertilized, has been born in Canada. Three other women are pregnant by the same process. The research was presented to the 23rd annual meeting of the European Society of Human Reproduction and Embryology on Monday, July 2.
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