61.   The CDC researchers found that single test-tube babies born full-term were more than twice as likely to have low birth weight as the comparison group.

62.   The researchers also found an increased risk of miscarriages, low birth weight, fetal distress and prematurity.

63.   Indigenous mothers give birth at a younger age and their infants are two to three times as likely to be of low birth weight than within the wider community.

a. + birth >>共 241
premature 8.71%
low 8.45%
partial 7.51%
vaginal 2.95%
illegitimate 2.82%
home 2.68%
so-called 2.41%
first 2.28%
difficult 2.14%
new 1.88%
low + n. >>共 803
pressure 7.49%
price 5.69%
level 5.04%
inflation 4.51%
rate 3.56%
heat 2.94%
cloud 2.62%
point 1.85%
unemployment 1.82%
turnout 1.76%
birth 0.33%
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