つわり

Key facts

Other names

Nausea and vomiting of pregnancy, nausea gravidarum, emesis gravidarum, pregnancy sickness

Specialty

Obstetrics

Symptoms

Nausea , vomiting

Complications

Wernicke encephalopathy , esophageal rupture

Usual onset

4th week of pregnancy

Duration

Until 16th week of pregnancy

Causes

Unknown

Diagnostic method

Based on symptoms after other causes have been ruled out

Differential diagnosis

Hyperemesis gravidarum

Prevention

Prenatal vitamins

Treatment

Doxylamine and pyridoxine

Frequency

~75% of pregnancies