Study finds why morning sickness is more severe for some pregnant women

It is hoped the discovery could help treat severe cases of the condition, which is known as hyperemesis gravidarum 

Pregnant woman suffering with nausea in morning hyperemesis. Picture: File

More effective treatments for severe cases of morning sickness could be on the horizon after researchers discovered the reason why some pregnant women suffer worse than others.

Academics from the UK, US and Sri Lanka said the condition is caused by exposure to the hormone GDF15 being produced by babies in the womb, with the severity of illness resting on how sensitive the mother is to the hormone.