Pregnant women with migraine headaches are more likely to have miscarriage and pregnancy-associated hypertension, and their babies are at risk for complications early after birth, a large study suggests.

Using Danish registries, researchers identified 23,000 pregnant women with migraine and compared them with 228,000 pregnant women without migraine.

Nearly 8% of women with migraine had pregnancy-associated hypertension disorders and 11.3% had miscarriages, whereas those rates were 5% and 10.3%, respectively, in women without headaches, the study found.

Among the babies these women delivered, 6.1% had low birth weight, compared with 5.1% of babies born to mothers without migraine.