Pregnancy and age..Women who wait until the age reaches the 30's to become pregnant are more likely to have twins, researchers said. When compared with three decades ago, old age pregnancy , the number of multiple births has increased nearly doubled in the United States.
Now, one of 30 babies born in the United States are born twins. In 1980, the ratio was 1 of 53, according to a study by Michigan State University.
old age pregnancy ..Scientists say the increase is a key factor in the increasing number of women undergoing fertility treatment because they are having difficulty getting pregnant after the age of 30. "Doctors said the findings could have important health implications and cost factors because women have a higher risk of multiple births.
Prior to 1980, women who have twins in the U.S. is fairly stable at around 2 per cent of all births, but that number has now increased dramatically in the last three decades,
Pregnancy and age..He told a conference in Italy that the number of births increased for women of all ages, particularly in those aged over 30. The number of triplets has also increased from one in every 651 babies in 2009, but was only one of the 2702 in 1980
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