A vacuum extraction might be considered if your labor meets certain criteria — your cervix is fully dilated, your membranes have ruptured and your baby has descended into the birth canal headfirst, but you're not able to push the baby out. A vacuum extraction is only appropriate in a birthing center or hospital where a C-section can be done, if needed.
Your health care provider might recommend vacuum extraction if:
- You're pushing, but labor isn't progressing. If you've never given birth before, labor is considered stalled if you've pushed for a period of two to three hours but haven't made any progress. If you've given birth before, labor might be considered stalled if you've pushed for a period of one to two hours without any progress.
- Your baby's heartbeat suggests a problem. If your health care provider is concerned about changes in your baby's heartbeat and an immediate delivery is necessary, he or she might recommend vacuum extraction.
- You have a health concern. If you have certain medical conditions — such as narrowing of the heart's aortic valve (aortic valve stenosis) — your health care provider might limit the amount of time you push.
Keep in mind that whenever vacuum extraction is recommended, a C-section is typically also an option.
Your health care provider might caution against vacuum extraction if:
- You're less than 34 weeks pregnant
- Your baby has previously had blood taken from his or her scalp (fetal scalp sampling)
- Your baby has a condition that affects the strength of his or her bones, such as osteogenesis imperfecta, or a bleeding disorder, such as hemophilia
- Your baby's head hasn't yet moved past the midpoint of the birth canal
- The position of your baby's head isn't known
- Your baby's shoulders, arms, buttocks or feet are leading the way through the birth canal
- Your baby might not be able to fit through your pelvis due to his or her size or the size of your pelvis