Definition of Sickness, morning

Sickness, morning: Nausea and vomiting of pregnancy.

Morning sickness is a misnomer, because it can occur at any time of the day (though not at night during sleep) and it is not a sickness. It is a normal characteristic of early pregnancy.

Morning sickness is now believed to be a good thing since it appears associated with a reduced risk of miscarriage and a greater chance that the pregnancy will have a healthy outcome.

Source: MedTerms™ Medical Dictionary
http://www.medterms.com/script/main/art.asp?articlekey=13393
Last Editorial Review: 6/14/2012