Can morning sickness startin 2nd trimester?

Morning sickness: Some patient experience morning sickness througt out the entire pregnancy although this is not the norm. Most of the time morning sickness decreases after 14 weeks of gestation. There is the possibility of other pathologies causing nausea and vomiting during pregnancy like liver disease, gallbladder disease, UTI etc. Check with yout doctor before thinking is only morning sickness.