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Objective: To identify sociodemographic and health services factors associated with receipt of immediate post-partum (IPP) contraception and the type of contraceptive method received., Materials and Methods: We used the National Health and Nutrition Survey (Ensanut), 2018-19, which contains information on 4 548 women aged 12-49 years who gave birth. We described receipt of IPP contraception and method type and used multivariable logistic (n=4 544) and multinomial regression (n=2 903) to examine receipt of any modern method and type of method., Results: 65% of women received IPP contraception. 56.8% of adolescents received long-acting reversible contraception (43.7% IUD & 13.1% implant). Being indigenous, having only one child, or receiving care in State Health Services/IMSS-Prospera or private sector facilities were associated with lower odds of receiving IPP contraception., Conclusions: We identify progress in the IPP contraception coverage among adoles-cents. Disparities persist in receipt of IPP contraception by type of health insurance., Competing Interests: Declaration of conflict of interests. The authors declare that they have no conflict of interests.

Objective: To evaluate health coverage for birth care in Mexico within the frame of maternal mortality reduction., Materials and Methods: Two information sources were used: 1) The comparison between the results yield by the Mexican National Health and Nutrition Surveys 2006 and 2012 (ENSANUT 2006 and 2012), and 2) the databases monitoring maternal deaths during 2012 (up to December 26), and live births (LB) in Mexico as estimated by the Mexican National Population Council (Conapo)., Results: The national coverage for birth care by medical units is nearly 94.4% at the national level, but in some federal entities such as Chiapas (60.5%), Nayarit (87.8%), Guerrero (91.2%), Durango (92.5%), Oaxaca (92.6%), and Puebla (93.4%), coverage remains below the national average. In women belonging to any social security system (eg. IMSS, IMSS Oportunidades, ISSSTE), coverage is almost 99%, whereas in those affiliated to the Mexican Popular Health Insurance (which depends directly from the Federal Ministry of Health), coverage reached 92.9%. In terms of Maternal Mortality Ratio (MMR), there are still large disparities among federal states in Mexico, with a national average of 47.0 per 100 000 LB (preliminary data for 2012, up to December 26). The MMR estimation has been updated using the most recent population projections., Conclusion: There is no correlation between the level of institutional birth care and the MMR in Mexico. It is thus necessary not only to guarantee universal birth care by health professionals, but also to provide obstetric care by qualified personnel in functional health services networks, to strengthen the quality of obstetric care, family planning programs, and to promote the implementation of new and innovative health policies that include intersectoral actions and human rights-based approaches targeted to reduce the enormous social inequity still prevailing in Mexico.

There is still controversy regarding the mechanism of action of levonorgestrel (LNG) for emergency contraception (EC). For those who state that pregnancy starts prior to implantation, any compound able to interfere with post-fertilization and pre-implantation stages, should be considered as abortifacient. Previous research suggests that EC in humans acts predominantly after fertilization. Current evidence with LNG-only EC supports a pre-fertilization mechanisms to explain its action. There are many potential mechanisms of action, which could vary pending on the day during the fertilization window of the ovarian cycle at which the contraceptive is given. This paper reviews the evidence for each potential mechanism of action. According to the most recently statements, it is concluded that the primary and possible the only mechanism of action of LNG-only EC is preventing or delaying ovulation.