New-Onset Migraine With Aura During Pregnancy: Warning Signs

By trimester

Weeks 1–13

1st trimester

Migraine, including with aura, can change unpredictably in early pregnancy, sometimes improving and sometimes appearing for the first time. Establishing a relationship with your prenatal provider early makes it easier to reach someone quickly if a first-time aura occurs.

Weeks 14–27

2nd trimester

This is a window where preeclampsia risk begins to climb for some pregnancies, part of why a first-time aura, or a significant change in a known migraine pattern, deserves the same urgency as any new neurological symptom rather than being assumed to be hormonal.

Weeks 28–birth

3rd trimester

Preeclampsia risk is highest in the third trimester, exactly when the symptom overlap with migraine aura matters most. Know your blood pressure numbers from recent visits, and consider a severe or first-time headache with vision changes a same-day medical concern.

What does the evidence show for new-onset migraine with aura?

• A 2025 systematic review and meta-analysis covering more than 94 million pregnancies found migraine with aura specifically raised the odds of ischemic stroke by about 23 times, compared with about 8 times for migraine without aura, a striking difference tied to the presence of aura symptoms specifically. 1
• Migraine overall was associated with markedly increased odds of stroke or transient ischemic attack during pregnancy, and even after researchers excluded cases also coded for preeclampsia in one study, a 15-fold increased stroke risk remained in pregnant women with migraine, suggesting migraine contributes independently rather than only through a preeclampsia connection. 1
• Migraine and preeclampsia share overlapping features, including headache, endothelial dysfunction, and elevated blood pressure, part of why the review recommends heightened clinical surveillance and targeted risk counseling, including possible referral to maternal-fetal medicine or neurology, for pregnant women with migraine. 1
• Sudden trouble seeing, sudden numbness or weakness especially on one side of the body, sudden severe headache with no known cause, sudden confusion or trouble speaking, and sudden trouble walking or loss of balance are the core stroke warning signs CDC lists, several of which overlap directly with how migraine aura can present. 2
• High blood pressure during pregnancy is the leading cause of stroke in pregnant women or those who have recently given birth, and CDC notes that women may mistake stroke symptoms, including headache, dizziness, or tingling in the arms, for issues related to pregnancy or a new baby rather than recognizing them as a medical emergency. 3
• Eclampsia, the more severe stage of preeclampsia, lists severe headache and vision problems such as temporary blindness as causes for immediate concern, symptoms that can look similar to a first-time migraine with aura but come from a different underlying process. 4

When should I call my provider about new-onset migraine with aura?

Sudden trouble seeing, sudden numbness or weakness especially on one side of the body, a sudden severe headache with no known cause, sudden confusion or trouble speaking, or sudden loss of balance or coordination are stroke warning signs that need emergency care immediately, not a wait-and-see approach. A severe headache combined with vision problems such as temporary blindness, swelling in the hands or face, or upper right abdominal pain can signal preeclampsia or eclampsia and also needs urgent evaluation. Because migraine with aura, stroke, and preeclampsia can look similar in the moment, regard any first-time aura, or a migraine that feels different from your usual pattern, as a reason to seek same-day medical evaluation rather than assuming it will pass. Trust your read on your own body. If something feels off beyond the list above, please consult your healthcare provider rather than waiting it out.