The number of women who become pregnant each year has more than doubled in the past decade, a new study found.

A new study released Monday in the journal Science found that fertile women had a 5.9% chance of becoming pregnant each day in the United States.

It also found that the probability of becoming a mother is about 7% for fertile women.

Researchers from the Centers for Disease Control and Prevention analyzed data from the National Vital Statistics System from 2000 to 2014.

They found that, overall, women with a low fertility rate (less than 2.4 children per woman) were about twice as likely to become pregnant as those with a high fertility rate, at about 6.5%.

“It’s clear that fertility and pregnancy are linked, so this study adds to the literature showing that having low fertility and being a fertile woman can lead to reduced risk for having a baby,” said Dr. Jocelyn K. Johnson, the study’s lead author.

“Our study suggests that the number of pregnancies that occur after an infertility diagnosis may be influenced by factors beyond the women’s own biology, such as the health of their family and community.”

The CDC also recommends women with low fertility try to get pregnant as soon as possible.

It recommends that women with at least three children be tested for a sexually transmitted infection.

If the test shows an infection, women who do not have the infection should be tested again.

But if the test does not show any infection, they should avoid having children until the test is positive.