5 Key Takeaways

• 1

  A study found no increased risk of major congenital malformations (MCMs) associated with tetracycline use during the first trimester of pregnancy.

• 2

  The research utilized data from a Swedish population-based cohort, comparing 6,340 infants exposed to tetracyclines with 63,316 unexposed controls.

• 3

  The prevalence of MCMs was similar between the exposed group (39.75 cases per 1,000) and the unexposed group (38.76 cases per 1,000).

• 4

  Subgroup analyses showed no significant associations for specific tetracycline agents, including doxycycline and lymecycline.

• 5

  Initial elevated risks for nervous system and eye anomalies diminished in sensitivity analyses with extended follow-up.