Timing of Coronavirus Disease 2019 (COVID-19) Vaccination and Effects on Menstrual Cycle Changes.

OBJECTIVE: To assess whether menstrual cycle timing (follicular or luteal phase) of coronavirus disease 2019 (COVID-19) vaccine administration is associated with cycle length changes. METHODS: We used prospectively collected (2021-2022) menstrual cycle tracking data from 19,497 reproductive-aged users of the application "Natural Cycles." We identified whether vaccine was delivered in the follicular or luteal phase and also included an unvaccinated control group. Our primary outcome was the adjusted within-individual change in cycle length (in days) from the average of the three menstrual cycles before the first vaccination cycle (individuals in the unvaccinated control group were assigned a notional vaccine date). We also assessed cycle length changes in the second vaccination cycle and whether a clinically significant change in cycle length (8 days or more) occurred in either cycle. RESULTS: Most individuals were younger than age 35 years (80.1%) and from North America (28.6%), continental Europe (33.5%), or the United Kingdom (31.7%). In the vaccinated group, the majority received an mRNA vaccine (63.8% of the full sample). Individuals vaccinated in the follicular phase experienced an average 1-day longer adjusted cycle length with a first or second dose of COVID-19 vaccine compared with their prevaccination average (first dose: 1.00 day [98.75% CI, 0.88-1.13], second dose: 1.11 days [98.75% CI, 0.93-1.29]); those vaccinated in the luteal phase and those in the unvaccinated control group experienced no change in cycle length (respectively, first dose: -0.09 days [98.75% CI, -0.26 to 0.07], second dose: 0.06 days [98.75% CI, -0.16 to 0.29], unvaccinated notional first dose: 0.08 days [98.75% CI, -0.10 to 0.27], second dose: 0.17 days [98.75% CI, -0.04 to 0.38]). Those vaccinated during the follicular phase were also more likely to experience a clinically significant change in cycle length (8 days or more; first dose: 6.8%) than those vaccinated in the luteal phase or unvaccinated (3.3% and 5.0%, respectively; P <.001). CONCLUSION: COVID-19 vaccine-related cycle length increases are associated with receipt of vaccination in the first half of the menstrual cycle (follicular phase).

Prenatal care utilization and perinatal outcomes among pregnant adolescents in Mexico, 2008-2019.

OBJECTIVE: To describe utilization of prenatal care and outcomes of low birth weight and preterm birth among adolescent births in Mexico. METHODS: We used birth certificate data and included live births to individuals 10-24 years, 2008-2019. Our outcomes were binary measures of adequate prenatal care, low birth weight, and preterm birth. We compared adolescents (10-14 years, 15-16, and 17-19) to those 20-24 years. We included individual-, clinical-, and municipality-level variables, used multivariable logistic regression, and calculated adjusted predicted probabilities. We also tested whether receipt of prenatal care moderated the relationship of age with preterm birth and low birth weight. RESULTS: We included a total of 12 106 710 births to women 10-24 years. The adjusted predicted probability of adequate prenatal care increased with age: 56.07% (95% CI 55.82-56.31%) adjusted probability among adolescents 10-14 years compared with 65.51% (95% CI 65.48%-65.55%) among individuals 20-24 years. Receipt of adequate prenatal care in part mitigated disparities in preterm birth and low birthweight across all age groups: 7.30% (95% CI 7.17%-7.43%) adjusted probability of delivering a preterm infant among those 10-14 years who received adequate prenatal care compared with 9.37% (95% CI 9.20%-9.53%) among those 10-14 years without adequate prenatal care. CONCLUSION: In Mexico, adolescent pregnancies are associated with inadequate prenatal care as well as higher odds of preterm delivery and low birth weight. Youngest adolescents (10-14 years) have the highest probability of adverse outcomes. Adequate prenatal care may help partially mitigate disparities in poor perinatal outcomes.

Association between COVID-19 and vaccination on menstrual cycle.

OBJECTIVE: To evaluate changes in the menstrual pattern of women of reproductive age infected with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) or vaccinated against coronavirus disease 2019 (COVID-19). METHODS: A cross-sectional study at the University of Campinas, Brazil using Google questionnaire applied from December 2021 through February 2022, disseminated through snowball technique. Participants responded about characteristics of their menstrual cycle before the pandemic and before COVID-19 vaccination, and then about characteristics of their cycle 3 months after infection with SARS-CoV-2 and 3 months after vaccination. Our primary outcome was a binary indicator of changes in the menstrual cycle. We used multivariate regression analysis to identify factors associated with menstrual changes. RESULTS: We received 1012 completed questionnaires and 735 (72.7%) were from women aged between 20 and 39 years, 745 (73.6%) were White and 491 (48.6%) lived with a partner. A total of 419 (41.6%) of the women reported SARS-CoV-2 infection; however, only two of them were hospitalized, and 995 (98.8%) of women had at least one dose of COVID-19 vaccine. About menstrual characteristics, 170 (41.3%) reported changes after having COVID-19 and 294 (29.9%) after COVID-19 vaccination, respectively. Few years of schooling, lower income, and non-white ethnicity were related to higher reports of menstrual changes after COVID-19. Menstrual changes after COVID-19 vaccination were associated with not using contraception. Higher body mass index was associated with irregularities in cyclicity and bleeding days, after COVID-19 and COVID-19 vaccination, respectively. CONCLUSION: Our results corroborated the stability of the menstrual cycle after having COVID-19 or COVID-19 vaccination; however, there is a potential relationship between menstrual changes and socioeconomic factors as well as contraceptive use.

Client-reported quality of facility-managed medication abortion compared with pharmacy-sourced self-managed abortion in Bangladesh.

OBJECTIVE: We used the newly developed Abortion Care Quality Tool (ACQTool) to compare client-reported quality of medication abortion care by source (facility-managed vs pharmacy-sourced self-managed abortion (SMA)) in Bangladesh. METHODS: We leveraged exit and 30-day follow-up surveys collected to develop and validate the ACQTool collected at nongovernmental organisation (NGO)-supported or -operated facilities in the public and private sector and pharmacies from three districts in Bangladesh. We used bivariate statistics to compare 18 client-reported quality indicators grouped in six domains and eight abortion outcomes, by source (facility vs pharmacy). We used multivariable logistic regression to identify factors associated with selected quality indicators and outcomes (abortion affordability, information provision, and knowing what to do for an adverse event), controlling for client sociodemographic characteristics. RESULTS: Of 550 abortion clients, 146 (26.5%) received a facility-managed medication abortion and 404 (73.5%) had a pharmacy-sourced SMA. Clients reported higher quality in facilities for five indicators, and higher in pharmacies for two indicators; the remaining 11 indicators were not different by source. Compared with facility-based clients, pharmacy clients had higher odds of reporting that the cost of abortion was affordable (adjusted odds ratio (aOR) 3.55; 95% CI 2.27 to 5.58) but lower odds of reporting high information provision (aOR 0.14; 95% CI 0.09 to 0.23). Seven of eight abortion outcomes showed no differences; pharmacy clients had lower odds of knowing what to do if an adverse event occurred (aOR 0.45; 95% CI 0.23 to 0.82). CONCLUSIONS: In Bangladesh, there is no difference in client-reported quality of medication abortion care between health facilities and pharmacies for the majority of quality and outcome indicators. However, information provision and preparedness were higher quality at facilities, while pharmacies were more affordable.

Awareness of the public charge, confidence in knowledge, and the use of public healthcare programs among Mexican-origin Oregon Latino/as.

OBJECTIVE: We describe awareness about the modified "public charge" rule among Oregon's Mexican-origin Latino/a population and whether concerns about the rule influenced disenrollment from state-funded programs, which do not fall under the public charge. METHODS: We conducted a cross-sectional survey of adults (ages 18-59) recruited at the Mexican consulate and living in the state of Oregon. Our outcomes were awareness (of the public charge, source of knowledge, and confidence in knowledge of the public charge) and disenrolling self or family members from state-funded public healthcare programs due to concerns about the rule. We described outcomes and used logistic regression and calculated adjusted probabilities to identify factors associated with awareness of the public charge. RESULTS: Of 498 Latino/a respondents, 48% reported awareness of the public charge. Among those who knew about the public charge, 14.6% had disenrolled themselves or family members from public healthcare programs and 12.1% were hesitant to seek care due to concerns about the public charge. Younger respondents had a lower adjusted probability of awareness of the public charge (18-24 years: 15.6% (95% CI 3.1-28.2); 30-39 years 54.9% (95% CI 47.7-62.0). Higher education was associated with a higher adjusted probability of awareness of the public charge; ability to speak English was not associated with awareness of the public charge. CONCLUSION: Our study reveals limited awareness about the public charge among Mexican-origin Oregon Latino/as. Outreach and advocacy are essential to ensure Latino/as know their rights to access available state-funded healthcare programs.

Contraceptive Method Switching and Long-Acting Reversible Contraception Removal in U.S. Safety Net Clinics, 2016-2021.

OBJECTIVE: To describe patterns of contraceptive method switching and long-acting reversible contraception (LARC) removal in a large network of community health centers. METHODS: We conducted a retrospective cohort study using individual-level electronic health record data from 489 clinics in 20 states from 2016 to 2021. We used logistic regression models, including individual-, clinic-, and state-level covariates, to calculate adjusted odds ratios and predicted probabilities of any observed contraceptive method switching and LARC removal among those with baseline incident LARC, both over 4-year time periods. RESULTS: Among 151,786 patients with 513,753 contraceptive encounters, 22.1% switched to another method at least once over the 4-year observation period, and switching patterns were varied. In patients with baseline LARC, the adjusted predicted probability of switching was 19.0% (95% CI 18.0-20.0%) compared with patients with baseline moderately effective methods (16.2%, 95% CI 15.1-17.3%). The adjusted predicted probability of switching was highest among the youngest group (28.6%, 95% CI 25.8-31.6% in patients aged 12-14 years) and decreased in a dose-response relationship by age to 8.4% (95% CI 7.4-9.4%) among patients aged 45-49 years. Latina and Black race and ethnicity, public or no insurance, and baseline Title X clinic status were all associated with higher odds of switching at least once. Among baseline LARC users, 19.4% had a removal (to switch or discontinue) within 1 year and 30.1% within 4 years; 97.6% of clinics that provided LARC also had evidence of a removal. CONCLUSION: Community health centers provide access to method switching and LARC removal. Contraceptive switching and LARC removal are common, and clinicians should normalize switching and LARC removal among patients.

Landscape of Pregnancy Care in US Community Health Centers.

PURPOSE: Community health centers (CHCs) provide critical health care access for people who experience high risks during and after pregnancy, however it is unclear to what extent they provide prenatal care. This study seeks to describe clinic and patient characteristics associated with longitudinal prenatal care delivery in CHC settings. METHODS: This retrospective cohort study utilized electronic health record (EHR) data from the Accelerating Data Value Across a National Community Health Center Network (ADVANCE) between 2018 to 2019 to describe prenatal care provision among CHCs (n = 408), and pregnant CHC patients (n = 28,578) and compared characteristics of patients who received longitudinal prenatal care at CHCs versus those who did not. RESULTS: 41% of CHCs provided longitudinal prenatal care; these CHCs were more likely to be larger, have multidisciplinary teams, and serve higher proportions of nonwhite or non-English speaking patients. Patients who received longitudinal prenatal care at CHCs were racially and ethnically diverse and many had comorbidities. Patients who received longitudinal prenatal care at CHCs (compared with pregnant patients who did not) were more likely to be white or Latinx and more likely to have non-English language preference. CONCLUSIONS: Many CHCs in this national network provide prenatal care and serve pregnant patients at high risk of pregnancy-related complications, including people of color, those with low income, and those with comorbidities. CHCs provide critical access to care for vulnerable populations and will be an important partner in work addressing inequities in maternal morbidity and mortality.

Public perceptions of abortion complications.

BACKGROUND: Misinformation contributes to the perception that abortion has substantial health risks, despite the known safety of medication and aspiration abortion. We lack detailed information about which health risks the public believes are most likely. OBJECTIVE: This study aimed to describe public perception of short- and long-term risks of abortion. STUDY DESIGN: We conducted a cross-sectional survey of US residents aged ≥18 years using Amazon Mechanical Turk (MTurk). We collected information regarding participant demographics, reproductive history, political views, and position on abortion restrictions. We provided participants with a list of 9 short-term and 15 long-term possible complications and asked them to indicate whether they occurred never (0%), very rarely (<1%), rarely (1%-5%), occasionally (5%-20%), or frequently (>20%) following abortion. We used descriptive statistics to understand our population demographics and to capture the perceived incidence of all complications. We created a binary indicator of answering all risk estimates incorrectly vs at least 1 estimate correctly, separately for all long-term possible complications, and the 2 short-term risks of infection and bleeding. We determined the proportion of individuals who responded incorrectly to all questions in each category and used multivariable logistic regression to identify factors associated with incorrect perceptions about the risks of abortion. RESULTS: For all listed complications, participant (N=1057) estimates of risk were higher than the known incidence. For both short-term risks of bleeding and infection, over 40% of participants reported that these outcomes occur occasionally or frequently. Similarly, for both long-term risks of depression and anxiety, over 60% of respondents reported that these outcomes occur occasionally or frequently after abortion. Participants reported that possible complications known to not be associated with abortion, including hair loss, future pregnancy complications, breast cancer, and cosmetic disfigurement, occurred at least rarely. Nearly one-quarter of participants responded that death occurs occasionally or frequently (in over 5% of abortions), and 79% of participants responded that breast cancer can result from abortion. One-quarter (24.9%) of participants incorrectly overestimated both short-term outcomes of infection and bleeding, whereas 19.5% answered all long-term complication questions incorrectly, including outcomes that never occur. On multivariable analyses, we identified that the participants most likely to incorrectly identify risks of abortion identified as Asian or Black race/ethnicity, were from rural communities, or believed that abortion should have more legal restrictions. CONCLUSION: The public perceives abortion to be much riskier than it actually is. This information can be used to develop targeted clinical and public health efforts to disseminate the true risks of abortion.

Impact of coronavirus disease 2019 (COVID-19) vaccination on menstrual bleeding quantity: An observational cohort study.

OBJECTIVE: To assess whether coronavirus disease 2019 (COVID-19) vaccination impacts menstrual bleeding quantity. DESIGN: Retrospective cohort. SETTING: Five global regions. POPULATION: Vaccinated and unvaccinated individuals with regular menstrual cycles using the digital fertility-awareness application Natural Cycles°. METHODS: We used prospectively collected menstrual cycle data, multivariable longitudinal Poisson generalised estimating equation (GEE) models and multivariable multinomial logistic regression models to calculate the adjusted difference between vaccination groups. All regression models were adjusted for confounding factors. MAIN OUTCOME MEASURES: The mean number of heavy bleeding days (fewer, no change or more) and changes in bleeding quantity (less, no change or more) at three time points (first dose, second dose and post-exposure menses). RESULTS: We included 9555 individuals (7401 vaccinated and 2154 unvaccinated). About two-thirds of individuals reported no change in the number of heavy bleeding days, regardless of vaccination status. After adjusting for confounding factors, there were no significant differences in the number of heavy bleeding days by vaccination status. A larger proportion of vaccinated individuals experienced an increase in total bleeding quantity (34.5% unvaccinated, 38.4% vaccinated; adjusted difference 4.0%, 99.2% CI 0.7%-7.2%). This translates to an estimated 40 additional people per 1000 individuals with normal menstrual cycles who experience a greater total bleeding quantity following the first vaccine dose' suffice. Differences resolved in the cycle post-exposure. CONCLUSIONS: A small increase in the probability of greater total bleeding quantity occurred following the first COVID-19 vaccine dose, which resolved in the cycle after the post-vaccination cycle. The total number of heavy bleeding days did not differ by vaccination status. Our findings can reassure the public that any changes are small and transient.

Association of maternal age 35 years and over and prenatal care utilization, preterm birth, and low birth weight, Mexico 2008-2019.

OBJECTIVE: To evaluate prenatal care utilization, low birth weight, and preterm birth among women aged 35 years and older in Mexico from 2008 to 2019. METHODS: We conducted a historical cohort study of all singleton live births in Mexico from 2008 to 2019. Outcomes were inadequate prenatal care, preterm birth, and low birth weight. We compared outcomes among women aged 35-39, 40-44, and 45-49 years with births to women aged 20-34 years. We used logistic regression to account for individual, health system, and contextual confounders. RESULTS: We included a total of 19 526 922 births; 2 325 725 (11.9%) were to women aged 35 years and older. Women aged 45-49 years had the lowest levels of education, were more likely to be uninsured, and came from highly marginalized municipalities while those aged 35-39 years had the highest levels of education and insurance and came from the least marginalized municipalities. The odds of inadequate prenatal care (adjusted odds ratio [aOR] 1.12; 95% confidence interval [CI] 1.09-1.15), preterm birth (aOR 2.05; 95% CI 1.97-2.13), and low birth weight (aOR 2.03; 95% CI 1.95-2.12) were highest for women aged 45-49 years, compared with women aged 20-34 years. The odds of adverse perinatal outcomes increased progressively with age, but the odds of inadequate prenatal care (aOR 0.77; 95% CI 0.76-0.77) were lowest for women aged 35-39 years, when compared with women aged 20-34 years. CONCLUSION: Women who deliver at 35 years and over are a heterogeneous group in Mexico. Being 35 years old and older is associated with increases in preterm birth and low birth weight neonates. Women who give birth between 45 and 49 years may be especially vulnerable.

Associations of Unintended Pregnancy With Maternal and Infant Health Outcomes: A Systematic Review and Meta-analysis.

Importance: Unintended pregnancy is common in the US and is associated with adverse maternal and infant health outcomes; however, estimates of these associations specific to current US populations are lacking. Objective: To evaluate associations of unintended pregnancy with maternal and infant health outcomes during pregnancy and post partum with studies relevant to current clinical practice and public health in the US. Data Sources: Cochrane Central Register of Controlled Trials and Database of Systematic Reviews, PsycINFO, SocINDEX, and MEDLINE databases (January 1, 2000, to June 15, 2022) and manual review of reference lists. Study Selection: Epidemiologic studies relevant to US populations that compared key maternal and infant health outcomes for unintended vs intended pregnancies and met prespecified eligibility criteria were included after investigators' independent dual review of abstracts and full-text articles. Data Extraction and Synthesis: Investigators abstracted data from publications on study methods, participant characteristics, settings, pregnancy intention, comparators, confounders, and outcomes; data were validated by a second investigator. Risk of bias was independently dual rated by investigators using criteria developed by the US Preventive Services Task Force. Results of studies controlling for confounders were combined by using a profile likelihood random-effects model. Main Outcomes and Measures: Prenatal depression, postpartum depression, maternal experience of interpersonal violence, preterm birth, and infant low birth weight. Results: Thirty-six studies (N = 524 522 participants) were included (14 cohort studies rated good or fair quality; 22 cross-sectional studies); 12 studies used large population-based data sources. Compared with intended pregnancy, unintended pregnancy was significantly associated with higher odds of depression during pregnancy (23.3% vs 13.9%; adjusted odds ratio [aOR], 1.59 [95% CI, 1.35-1.92]; I2 = 85.0%; 15 studies [n = 41 054]) and post partum (15.7% vs 9.6%; aOR, 1.51 [95% CI, 1.40-1.70]; I2 = 7.1%; 10 studies [n = 82 673]), interpersonal violence (14.6% vs 5.5%; aOR, 2.22 [95% CI, 1.41-2.91]; I2 = 64.1%; 5 studies [n = 42 306]), preterm birth (9.4% vs 7.7%; aOR, 1.21 [95% CI, 1.12-1.31]; I2 = 1.7%; 10 studies [n = 94 351]), and infant low birth weight (7.3% vs 5.2%; aOR, 1.09 [95% CI, 1.02-1.21]; I2 = 0.0%; 8 studies [n = 87 547]). Results were similar in sensitivity analyses based on controlling for history of depression for prenatal and postpartum depression and on study design and definition of unintended pregnancy for relevant outcomes. Studies provided limited sociodemographic data and measurement of confounders and outcomes varied. Conclusions and Relevance: In this systematic review and meta-analysis of epidemiologic observational studies relevant to US populations, unintended pregnancy, compared with intended pregnancy, was significantly associated with adverse maternal and infant outcomes. Trial Registration: PROSPERO Identifier: CRD42020192981.

Association between menstrual cycle length and covid-19 vaccination: global, retrospective cohort study of prospectively collected data.

OBJECTIVES: To identify whether covid-19 vaccines are associated with menstrual changes in order to address concerns about menstrual cycle disruptions after covid-19 vaccination. DESIGN: Global, retrospective cohort study of prospectively collected data. SETTING: International users of the menstrual cycle tracking application, Natural Cycles. PARTICIPANTS: 19 622 individuals aged 18-45 years with cycle lengths of 24-38 days and consecutive data for at least three cycles before and one cycle after covid (vaccinated group; n=14 936), and those with at least four consecutive cycles over a similar time period (unvaccinated group; n=4686). MAIN OUTCOME MEASURES: The mean change within individuals was assessed by vaccination group for cycle and menses length (mean of three cycles before vaccination to the cycles after first and second dose of vaccine and the subsequent cycle). Mixed effects models were used to estimate the adjusted difference in change in cycle and menses length between the vaccinated and unvaccinated. RESULTS: Most people (n=15 713; 80.08%) were younger than 35 years, from the UK (n=6222; 31.71%), US and Canada (28.59%), or Europe (33.55%). Two thirds (9929 (66.48%) of 14 936) of the vaccinated cohort received the Pfizer-BioNTech (BNT162b2) covid-19 vaccine, 17.46% (n=2608) received Moderna (mRNA-1273), 9.06% (n=1353) received Oxford-AstraZeneca (ChAdOx1 nCoV-19), and 1.89% (n=283) received Johnson & Johnson (Ad26.COV2.S). Individuals who were vaccinated had a less than one day adjusted increase in the length of their first and second vaccine cycles, compared with individuals who were not vaccinated (0.71 day increase (99.3% confidence interval 0.47 to 0.96) for first dose; 0.56 day increase (0.28 to 0.84) for second dose). The adjusted difference was larger in people who received two doses in a cycle (3.70 days increase (2.98 to 4.42)). One cycle after vaccination, cycle length was similar to before the vaccine in individuals who received one dose per cycle (0.02 day change (99.3% confidence interval -0.10 to 0.14), but not yet for individuals who received two doses per cycle (0.85 day change (99.3% confidence interval 0.24 to 1.46)) compared with unvaccinated individuals. Changes in cycle length did not differ by the vaccine's mechanism of action (mRNA, adenovirus vector, or inactivated virus). Menses length was unaffected by vaccination. CONCLUSIONS: Covid-19 vaccination is associated with a small and likely to be temporary change in menstrual cycle length but no change in menses length.

Disparities in postpartum contraceptive use among immigrant women with restricted Medicaid benefits.

BACKGROUND: The Emergency Medicaid program offers restricted Medicaid benefits for people who meet the same financial eligibility criteria as Traditional Medicaid recipients but do not meet the citizenship requirements for enrollment in Traditional Medicaid. By federal law, Emergency Medicaid covers care for life-threatening emergencies or a hospital admission for childbirth. No prenatal or postpartum care is covered. Most of the women enrolled in Emergency Medicaid are Latina. OBJECTIVE: We assessed postpartum visits and receipt of postpartum contraception and compared the outcomes for Emergency (restricted benefit) Medicaid recipients with those of Traditional (full-benefit) Medicaid recipients in Oregon and South Carolina, 2 states with similar-sized immigrant populations. STUDY DESIGN: We conducted a retrospective cohort study using linked Medicaid claims and birth certificate data of live births covered by Medicaid (Traditional and Emergency) between January 1, 2010 and September 30, 2017, in Oregon and South Carolina. Our analysis was at the individual level. Primary outcomes were postpartum visit attendance and receipt of postpartum contraception within 2 months. We examined differences in demographic and delivery characteristics by Medicaid type. If women received postpartum contraception, we compared the timing of receipt (immediate postpartum, ≤1 month, 1-2 months, and 2-6 months after delivery) by the type of Medicaid. Among women using contraception, we described the type of contraceptive received at each time point, stratified by Medicaid type. Associations between Medicaid type (Traditional vs Emergency) and postpartum visit attendance and contraception use were assessed using adjusted absolute predicted probabilities from logistic regression models. We ran models for the entire cohort and conducted a subanalysis restricted to only Latina women. RESULTS: Our study included 375,544 live births to 288,234 women, with 12.7% of births among Emergency Medicaid recipients. Women enrolled in Emergency Medicaid tended to be older (age >35 years; 18.1% vs 7.2%; P<.001) and were more likely to be multiparous (76.8% vs 60.8%; P<.001) and Latina (80.3% vs 9.5%; P<.001) than their Traditional Medicaid peers. Among women enrolled in Emergency Medicaid, the probability of having a postpartum visit was 6.1% (95% confidence interval, 5.9-6.4) compared with 58.8% (95% confidence interval, 58.6-58.9) for women covered by Traditional Medicaid. After 6 months following delivery, 97.6% of Emergency Medicaid recipients had no evidence of contraceptive use compared with 55.6% of Traditional Medicaid enrollees (P<.001). In our adjusted model, Emergency Medicaid recipients were also significantly less likely to receive postpartum contraception than Traditional Medicaid enrollees (1.9% vs 35.5%; 95% confidence interval, [1.8-2.1] vs [35.4-35.7]). We examined the role that race may play in postpartum contraceptive use by conducting a subanalysis restricted to Latina women only.Latinas with births covered by Emergency Medicaid had a 1.9% (95% confidence interval, 1.8-2.0) adjusted probability of postpartum contraception use within 2 months compared with 39.8% (95% confidence interval, 38.7-39.9) among Latinas enrolled in Traditional Medicaid. CONCLUSION: Women enrolled in Emergency Medicaid experience large disparities in postpartum care and contraceptive use. Policies that restrict Medicaid coverage following delivery exacerbate inequities in postpartum care, potentially leading to worse health outcomes for low-income immigrants and their children.

Willingness to Participate in Health Research: Mexican and Mexican American Women's Perspectives.

Background: Lack of racial and ethnic diversity in health research negatively impacts generalizability. We describe Mexican and Mexican American women's willingness to participate in health research in Oregon. Methods: We conducted a survey with Mexican-origin Latinas aged 18-49 years. Our primary outcome was willingness to participate in health research; we also asked sociodemographics and barriers and facilitators to participation. We used logistic regression to identify factors associated with willingness to participate. Results: Of 500 participants, 41% said that they would be willing to participate in health research, 14% said no, and 45% were unsure. In multivariable analyses, past participation in research and speaking English well were independently associated with willingness to participate. Barriers to participation included language, accessibility, and fear of medical procedures. Facilitators included improving future health care, language, and free medical care. Conclusions: Mexican-origin Latinas in Oregon are willing to participate in health research, but many are unsure. Providing study materials in Spanish is a concrete first step to improve recruitment and promote equity and inclusion.

Patterns in Contraceptive Use Among Women of Mexican Origin in the United States and in Mexico.

OBJECTIVE: To examine current contraceptive use by parity among four ethnicity and nativity groups: non-Latina White women in the United States, Mexican-American women in the United States, foreign-born women of Mexican origin in the United States, and Mexican women in Mexico. METHODS: We combined nationally representative data from sexually active women, aged 15-44 years, and not seeking pregnancy from the U.S. National Survey of Family Growth and the Mexican National Survey of Demographic Dynamics. This is a secondary binational analysis. Using multivariable logistic regression, we estimated the prevalence of moderately or most effective contraceptive method use (compared with least effective or no contraceptive method) by ethnicity and nativity and tested the interaction between ethnicity and nativity and parity. RESULTS: Compared with non-Latina White women, women of Mexican origin had lower odds of using a moderately or most effective contraceptive method (adjusted odds ratio [aOR] [95% CI] Mexican-American women: 0.69 [0.54-0.87]; foreign-born women: 0.67 [0.48-0.95]; Mexican women in Mexico: 0.59 [0.40-0.87]). Among parous women, the adjusted probability of using a moderately or most effective contraceptive method was approximately 65% among all four groups. Contraceptive method use did not differ by parity among non-Latina White women. However, parous Mexican-American women were 1.5 times more likely to use moderately or most effective contraceptive methods than nulliparous Mexican-American women (adjusted probability 66.1% vs 42.7%). Parous foreign-born women were 1.8 times more likely to use most or moderately effective contraceptive methods than their nulliparous counterparts (64.5% vs 36.0%), and parous Mexican women in Mexico were three times more likely to use moderately or most effective contraceptive methods (65.2% vs 21.5%). CONCLUSION: Findings suggest that access to effective contraception is limited outside the context of childbearing for women of Mexican origin in the United States and, to an even larger extent, in Mexico.

Adolescent Reproductive Health Outcomes Among Mexican-Origin Women on Both Sides of the U.S.-Mexico Border.

PURPOSE: Much reproductive health research on the Latina population overlooks heterogeneity by national origin, nativity, and age and also ignores how U.S.-based populations differ from those in "sending" nations. The purpose of this study is to describe a history of adolescent birth, age at first sex, and contraceptive use at first sex in the Mexican-origin population in both the United States and Mexico. METHODS: We developed a binational dataset merging two comparable nationally representative cross-sectional surveys in the United States and Mexico and used covariate balancing propensity scores to balance the age structure of our four samples: U.S.-born Latinas of Mexican origin, foreign-born Latinas of Mexican origin, U.S.-born non-Latina Whites, and Mexican women residing in Mexico. We used a negative binomial regression and calculated the predicted probability of experiencing at least one adolescent birth for each ethnicity/nativity group, stratified by 5-year age group. We also described age and contraceptive use at first sex. RESULTS: Foreign-born Latinas of Mexican origin and Mexicans in Mexico had similar adjusted probabilities of reporting an adolescent birth (30.1% and 29.9%, respectively), which were higher than those of Mexican-Americans (26.2%) and U.S.-born non-Latina Whites (11.6%). History of an adolescent birth is declining across all four groups among younger ages. Differences do not appear to be driven by the timing of first sex but by contraceptive use, which is increasing among younger age groups. DISCUSSION: Access to and use of effective contraception rather than timing of initiation of sexual activity is a key determinant of U.S. Latina and Mexican adolescent births.