A small dose of aspirin in pregnancy can help prevent high blood pressure complications, expert guidance for the NHS in England and Wales says.
High blood pressure in pregnancy is linked to pre-eclampsia - a leading cause of maternal death in the UK.
The National Institute for Health and Clinical Excellence says women at risk need aspirin from the 12th week of pregnancy until the birth of the child.
Up to 5% of first-time mothers will develop pre-eclampsia, figures show.
And midwives say it is likely to become increasingly common. This is because more women are delaying pregnancy until they are older and more are also overweight - two major risk factors for high blood pressure in pregnancy.
Read the story on the BBC news website.
