GDF15 linked to maternal risk of nausea and vomiting during pregnancy (nature.com)

GDF15, a hormone acting on the brainstem, has been implicated in the nausea and vomiting of pregnancy (NVP) including its most severe form, Hyperemesis Gravidarum (HG)

Here's the full study:

https://www.hyperemesis.org/wp-content/uploads/2023/12/Fejzo...

Nice high level summary of the research:

https://www.hyperemesis.org/news/nature2023/