Trisomy after pregestational contact with communicable disease

Area of Science:

• Obstetrics and Gynecology
• Pediatrics
• Epidemiology

Background:

• Household contact with communicable diseases during pregnancy is a known risk factor for adverse fetal outcomes.
• Specific infections like rubella are teratogenic and can cause congenital abnormalities.

Purpose of the Study:

• To investigate the potential association between maternal exposure to common communicable diseases before conception and the occurrence of autosomal trisomy in offspring.
• To explore if pregestational exposure to infections like rubella, measles, mumps, or varicella influences the risk of Down syndrome and other trisomies.

Main Methods:

• A cohort study identified 619 mothers with known household contact with rubella, infectious hepatitis, measles, mumps, or varicella.
• Contact timing relative to the last menstrual period was recorded.
• Offspring were monitored for congenital abnormalities, specifically autosomal trisomies.

Main Results:

• Five cases of autosomal trisomy were observed, including four with Down syndrome and one with trisomy 18.
• The mothers of these five infants had been exposed to a communicable disease within the five months preceding pregnancy.
• This suggests a potential link between pregestational maternal infections and trisomy development.

Conclusions:

• Maternal pregestational exposure to communicable diseases may be a contributing factor to autosomal trisomy in offspring.
• The findings warrant further investigation into the mechanisms and specific risks associated with infections like rubella during the periconceptional period.