The purpose of the study is to evaluate the risk of pregnancy and infant outcomes among women with migraine exposed to rimegepant during pregnancy and in two rimegepant unexposed comparator groups.

Inclusion Criteria (All Pregnancies):

All pregnant women aged 16 to 49 years, inclusive, at the estimated LMP within the study observation period are eligible to enter in the study.

Exclusion Criteria (All Pregnancies):

• Has insufficient information to estimate LMP
• Has at least 1 pharmacy dispensing for ditans (i.e., lasmiditan) within a 5-half-life time window before the estimated LMP through whichever is first: end of pregnancy or end of the study period
• Has at least 1 pharmacy dispensing for a CGRP receptor antagonist other than rimegepant (i.e., ubrogepant, atogepant, and zavegepant) within a 5-half-life time window before the estimated LMP through whichever is first: end of pregnancy or end of the study period
• Has at least 1 pharmacy dispensing for CGRP monoclonal antibodies (i.e., erenumab, fremanezumab, eptinezumab, and galcanezumab) within a 5-half-life time window before the estimated LMP through whichever is first: end of pregnancy or end of the study period

Additional Eligibility Criteria (Rimegepant-Exposed Group):

• Have a migraine diagnosis any time before the estimated LMP and through whichever is first: end of pregnancy or end of the study period
• Have at least 1 pharmacy dispensing for rimegepant within the 30-day time window before the estimated LMP and through whichever is first: end of pregnancy or end of the study period
• Have a recorded outcome of pregnancy within the study period
• Had continuous enrollment in a health care plan with medical and pharmacy benefits during the 6-month period before the estimated LMP through a postpartum period of 42 days

Additional Inclusion Criteria (Primary Comparator Group):

• Have a migraine diagnosis any time before the estimated LMP and through whichever is first: end of pregnancy or end of the study period
• Have at least 1 pharmacy dispensing for a medication indicated for the treatment of migraine within the 30-day time window before the estimated LMP and ending with whichever is first: end of pregnancy or end of the study period.
• Have a recorded outcome of pregnancy within the study period
• Had continuous enrollment in a health care plan with medical and pharmacy benefits during the 6-month period before the estimated LMP through a postpartum period of 42 days

Additional Exclusion Criteria (Primary Comparator Group):

• Have at least 1 pharmacy dispensing for rimegepant within the 30-day time window before the estimated LMP and through whichever is first: end of pregnancy or end of the study period

Additional Inclusion Criteria (Secondary Comparator Group):

• Have no migraine diagnosis any time before the estimated LMP through whichever is first: end of pregnancy or end of the study period
• Have a recorded outcome of pregnancy within the study period
• Had continuous enrollment in a health care plan with medical and pharmacy benefits during the 6-month period before the estimated LMP through a postpartum period of 42 days

Additional Exclusion Criteria (Secondary Comparator Group):

• Have at least 1 pharmacy dispensing for rimegepant within the 30-day time window before the estimated LMP through whichever is first: end of pregnancy or end of the study period

Study population will consist of pregnant women (any age) as well as the infants (male and female) born to enrolled participants through age 1 year

Pfizer will provide access to individual de-identified participant data and related study documents (e.g. protocol, Statistical Analysis Plan (SAP), Clinical Study Report (CSR)) upon request from qualified researchers, and subject to certain criteria, conditions, and exceptions. Further details on Pfizer's data sharing criteria and process for requesting access can be found at: https://www.pfizer.com/science/clinical\_trials/trial\_data\_and\_results/data\_requests.