SciShow Explains the Possible Causes of Morning Sickness

SciShow and its host Hank Green take on the topic of what causes morning sickness during pregnancy in its most recent episode. The short answer is that there’s no clear single cause, but there are a number of theories explored in the video.

One idea is that significant increases in the levels of hormones like progesterone and estrogen in pregnant women cause ill effects. Other scientists suggest hypoglycemia could be a cause, and yet another theory proposes that morning sickness is actually an evolutionary adaptation.

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