This is one test you really do want to pass. But if the Pap smear does come back abnormal, don't panic. Often, inflammation or hormonal changes may yield an abnormal but innocent Pap. The Pap smear is not a legitimate diagnostic test, but just a screen. When it's abnormal, the obstetrician must make a real diagnosis by biopsy.
Many dysplasias simply fade away after a pregnancy.
If there is a lesion, the obstetrician can trace it. When this is the case, periodic colposcopies are done throughout the pregnancy until management after delivery can be arranged. This poses a particular problem and a risk, because no diagnosis is complete unless it is based on the complete lesion. If the only part seen is a very mild dysplasia, but nevertheless one that extends up the canal out of sight, it is invasive cancer. Managing it conservatively is a big mistake.