Age may not be a barrier to reproduction in women ;
is a general belief that the biological clock a woman begins to diminish as you get older. This in turn affects their chances of getting pregnant and also poses a threat of a high-risk pregnancy. However, recent studies show that this old hypothesis, which states that as a woman ages, the eggs they produce have more defective chromosomes – which lead to miscarriages and developmental disorders – does not have much water, according to new research. The hypothesis of the assembly line said that the first eggs produced in the fetal stage of a woman tend to have better connections or “crossover” between chromosomes. Also read how to delay pregnancy by opting for egg freezing technology.
However, after counting the crossings real chromosomes in thousands of eggs, researchers at Washington State University found that eggs produced later were no different from the that they occur early in the fetal stage. “If the hypothesis production line was true, you would expect a lot of abnormal cells and to expect them all to be happening later,” said Ross Rowsey, one of the researchers.
“We see a very high incidence of abnormal cells, but are just as likely to be happening soon as the end,” he added. Rowsey studied more than 8,000 eggs from 191 fetal ovaries second quarter. He saw a lot of variation in women and among women, but is not related to the age of the woman. Also read What is a high-risk pregnancy.
‘There must be other factors involved, “he said.” Abnormal crosses can not explain all of it, “said Rowsey. The production line hypothesis was proposed in 1968 by Alan Henderson and Robert Edwards, Nobel Prize-winning development of in-vitro fertilization.
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