title: Risk of birth defects after use of acyclovir, valacyclovir, and famciclovir in the first trimester.
authors.forename: Bing
authors.initials: B
authors.lastname: Hou
authors.forename: Yuanchao
authors.initials: Y
authors.lastname: Zhang
mesh_terms: D015075:2-Aminopurine / Q000009:adverse effects / Q000031:analogs & derivatives* / Q000627:therapeutic use; D000014:Abnormalities, Drug-Induced / Q000453:epidemiology*; D000212:Acyclovir / Q000009:adverse effects* / Q000031:analogs & derivatives* / Q000627:therapeutic use; D015331:Cohort Studies; D003627:Data Interpretation, Statistical; D003718:Denmark / Q000453:epidemiology; D000077595:Famciclovir; D005260:Female; D006801:Humans; D011247:Pregnancy; D011261:Pregnancy Trimester, First; D055656:Prescriptions / Q000706:statistics & numerical data; D012306:Risk; D000077483:Valacyclovir; D014633:Valine / Q000009:adverse effects / Q000031:analogs & derivatives* / Q000627:therapeutic use
chemical_list: D015075:2-Aminopurine; D014633:Valine; D000077483:Valacyclovir; D000077595:Famciclovir; D000212:Acyclovir