Complications of chicken pox during pregnancy
Pregnant women who have chicken pox are at risk of complications. The type of complications depend on when the infection developed during pregnancy.
- Pregnant women who have chicken pox during the first half of pregnancy may go into labour early (premature labour) or have a miscarriage.
- Pregnant women who have chicken pox in the last part of pregnancy are more likely to develop varicella pneumonia. Even a healthy pregnant woman is at risk of dying if she develops varicella pneumonia.
- About 2% to 3% of fetuses whose mothers have chicken pox during the first 20 weeks of pregnancy will also develop chicken pox.1 This is called congenital varicella and can cause:
- Birth defects. Birth defects can include one limb (usually a leg) smaller than the other, scars on the limbs, or eye problems such as cloudy lenses.
- Low birth weight (weigh less than expected at birth).
- Seizures. The baby can have seizures after birth.
- Mental retardation.
- Shingles. Fetuses who have chicken pox will not have chicken pox again. However, they can still have shingles, even as babies or young children.
- Death. About 50% of those fetuses who develop congenital varicella die.1
- Newborn babies are likely to develop chicken pox within 5 to 10 days after birth when the mother had the illness a few days before or during delivery. These babies are at greater risk of complications from chicken pox.
| Author: | Douglas Dana Amy Fackler, MA Debby Golonka, MPH | Last Updated: August 25, 2006 |
| Medical Review: | Adam Husney, MD - Family Medicine Michael J. Sexton, MD - Pediatrics Thomas Emmett Francoeur, MDCM, CSPQ, FRCPC - Pediatrics | |
 | ||
| |