What is the typical trimester during which hyperemesis gravidarum persists?

Hyperemesis gravidarum is a severe form of nausea and vomiting during pregnancy that can lead to dehydration and weight loss. This condition typically occurs during the first trimester, with many women experiencing symptoms that peak around the end of the first trimester and start to improve in the second trimester.

In the case of hyperemesis gravidarum, while it may continue into the second trimester for some women, it is primarily associated with the hormonal changes that occur early in pregnancy. The rapid increase in hormones, particularly human chorionic gonadotropin (hCG) and estrogen, is believed to contribute significantly to nausea and vomiting during that time.

As pregnancy progresses into the later trimesters, the symptoms usually decrease for most women, especially as hormone levels begin to stabilize and physiological changes take place in the body. Therefore, while it’s acknowledged that a few cases of hyperemesis gravidarum can extend beyond the first trimester and into the second, the first trimester is when the condition is most typically noted.