| Absolute | Relative |
| -Hemodynamically significant heart disease | -Anemia |
| -Restrictive lung disease | -Unevaluated maternal cardiac arryhthmia |
| -Incompetent cervix or cerclage | -Chronic bronchitis |
| -Multiple gestation at risk of premature labor | -Poorly controlled type 1 diabetes |
| -Persistent second- or third-trimester bleeding | -Extreme morbid obesity |
| -Placenta previa after 26 weeks of gestation | -Extreme underweight |
| -Premature labor during the current pregnancy | -History of extremely sedentary lifestyle |
| -Rupture of membranes | -Intrauterine growth restriction in the current pregnancy |
| -Preeclampsia or pregnancy-induced hypertension | -Poorly controlled hypertension |
| -Severe anemia | -Orthopedic limitations |
|
| -Poorly controlled seizure disorder |
|
| -Poorly controlled hyperthyroidism |
|
| -Heavy smoking |