Morning sickness usually won't hit you until about 6 weeks after conception, although it can come on as early as 4 weeks for some women. It
usually ends by the 16th week of pregnancy, when your level of pregnancy hormones is lower. Unfortunately, some women experience morning sickness
throughout their pregnancy.
Even though the name implies that "morning sickness" only happens in the morning, it can occur at any time during the day or even in the night.
Morning sickness affects approximately 50 to 80% of all pregnant women, so you are definitely not alone.
Symptoms include nausea and vomiting. If severe, morning sickness can cause dehydration and weight loss.