How safe is acyclovir in first trimester of pregnancy, and is it safe to treat herpes zoster in the first trimester with acyclovir? Response from Peter S. Bernstein, MD, MPH, FACOG and Peter Van
A primary herpes occurrence during the first trimester of pregnancy The occurrence of major birth defects during first-trimester exposure to acyclovir
during the first trimester of pregnancy. Fluconazole and acyclovir exposure: conclusions from the international acyclovir pregnancy registry
In the cornerstone paper Outcomes following systemic prenatal acyclovir exposure: Conclusions from the international acyclovir pregnancy registry, 2024 2024, the authors investigated the use of oral acyclovir in 1246 pregnancies: 756 in the first trimester, 197 in the second trimester, and 291 in the third trimester .
The Acyclovir Registry documented outcomes of 1246 exposures to acyclovir during pregnancy (756 with earliest exposure in the first trimester, 197 in the second trimester, 291 in the third trimester, and 2 unknown); the prevalence of major birth defects with first trimester and any trimester exposures to acyclovir was 3.2% and 2.6%, respectively.
The Acyclovir Registry documented outcomes of 1246 exposures to acyclovir during pregnancy (756 with earliest exposure in the first trimester, 197 in the second trimester, 291 in the third trimester, and 2 unknown); the prevalence of major birth defects with first trimester and any trimester exposures to acyclovir was 3.2% and 2.6%, respectively.
How safe is acyclovir in first trimester of pregnancy, and is it safe to treat herpes zoster in the first trimester with acyclovir? Response from Peter S. Bernstein, MD, MPH, FACOG and Peter Van
The Acyclovir Registry documented outcomes of 1246 exposures to acyclovir during pregnancy (756 with earliest exposure in the first trimester, 197 in the second trimester, 291 in the third trimester, and 2 unknown); the prevalence of major birth defects with first trimester and any trimester exposures to acyclovir was 3.2% and 2.6%, respectively.
Pregnancy category Acyclovir and pregnancy. Studies of acyclovir taken in the first trimester of pregnancy have shown no increase in congenital
Morning sickness usually manifests right at the beginning of the pregnancy, typically around 20 days after conception occurs, and continues for a few weeks, in extreme cases sometimes well into the second trimester, and is usually gone by 8 weeks (although it can linger for literally half the pregnancy, but if that was the case with Amanda, she would be very visibly pregnant, so why hasn't Jace noticed...?)