The causes of preterm labor are not fully understood although many factors have been associated with early labor. These include (select all that apply)
a. Singleton pregnancy
b. History of cone biopsy
c. Smoking
d. Short cervical length
e. Higher level of education
B, C, D
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Correct A history of cone biopsy, smoking, and short cervical length are maternal
risk factors for preterm labor. Others include chronic illness, DES
exposure as a fetus, uterine abnormalities, obesity, previous preterm labor
or birth, number of embryos implanted, preeclampsia, anemia, or
infection.
Incorrect Uterine distention caused by multifetal pregnancy or hydramnios are risk
factors for preterm labor. Low educational level, low socioeconomic
status, little or no prenatal care, poor nutrition, or non-white ethnicity are
all demographic risk factors for preterm labor and birth.
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