Margerison CE, et al. - Data on 58,365 low-income women aged 18–44 years from the 2011–2016 Behavioral Risk Factor Surveillance System were examined in order to investigate the influence of expanded Medicaid eligibility (both prior to and following the Affordable Care Act) on measures of preventive healthcare and behaviors among low-income women of reproductive age. Expanded Medicaid eligibility was related to elevated healthcare coverage and utilization, better self-rated health, and declines in avoidance of care because of due to cost, heavy drinking, and binge drinking. The diagnoses of chronic conditions, smoking cessation, or BMI was unaffected by Medicaid eligibility. Medicaid eligibility was correlated with greater gains in health insurance, utilization, and health among married (vs unmarried) women. Conversely, women with any (vs no) dependent children had minute gains in insurance after the Medicaid expansion, however, with greater take-up of insurance when eligibility rose and higher behavioral responses to gaining insurance. Thus, expanded Medicaid coverage may enhance access to and use of healthcare among women of reproductive age, which could eventually increase preconception health.