09/20/2016 01:20 EDT | Updated 09/20/2016 02:24 EDT

When Does Morning Sickness Start?

And, no, it doesn't always happen in the morning.

Morning sickness is the term used to describe the nausea and vomiting expectant women can experience during their first trimester. This pregnancy symptom is caused by increased hormones in their body.

While every pregnancy is different, morning sickness usually starts around the sixth week.

“Morning sickness shows up most commonly between weeks six and eight,” says Dr. Michele Hakakha, a Beverly Hills M.D. and ob-gyn. “It's almost unheard-of to get morning sickness prior to week six, and generally, it's not going to start after week 14.”

The term morning sickness is deceptive because feelings of nausea and queasiness can occur at any time of day, not just in the AM. But while the pregnancy symptom might seem awful, researchers have discovered that there is actually a positive side to it.

Watch the video above to hear why morning sickness can be a good thing for moms and babies.

If you don’t experience morning sickness while pregnant, that’s okay, too. According to Dr. Hakakha, nearly 30 per cent of expectant moms “skip out on any nausea.”

Dr. Gerald M. DiLeo, a Los Angeles obstetrician, also agreed that having no morning sickness is not necessarily a bad thing. “Just because you don’t feel nauseous doesn’t mean that something is wrong with your unborn baby,” he told PopSugar. “If you’re still concerned, don’t be shy about setting an appointment with your healthcare provider to reassure you that you and your baby are just fine.”

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