title: Altered sex ratio after an outbreak of hepatitis.
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D004196:Disease Outbreaks; D004739:England; D005260:Female; D005313:Fetal Death / Q000209:etiology; D005865:Gestational Age; D006506:Hepatitis A / Q000150:complications*; D006801:Humans; D007231:Infant, Newborn; D008297:Male; D008423:Maternal Age; D008431:Maternal-Fetal Exchange; D010290:Parents; D011247:Pregnancy; D012737:Sex Factors; D012744:Sex Ratio; D014852:Wales