Researchers investigated if hypertensive disorders of pregnancy (HDP) are associated with the risk of developing asthma at or before the age of 7 years using the UK Millennium Cohort Study (MCS).

• For wave one of the MCS, recruitment of 18,552 families was done when the child was 9 months old; the families subsequently participated in waves two, three and four when the children were 3, 5 and 7 years, respectively.

• Mothers self-reported HDP in wave one.

• Analysis suggests increased risks of developing asthma by age 7 among children exposed to HDP, particularly if they were born preterm or SGA.