FEEM working papers "Note di lavoro"
Date: 21/9/2018

Growing in the Womb: The Effect of Seismic Activity on Fetal Growth

Rocío Álvarez-Aranda (Universidad Central de Chile); Serafima Chirkova (Universidad Central de Chile); José Gabriel Romero (Universidad Central de Chile)
JEL n.: C23, I12, J13
Keywords: Maternal Stress, Birth Outcomes, Natural Disasters, Mother-Fixed-Effects


We study how prenatal maternal stress, caused by sustained seismic activity, affects birth outcomes in Chile during the period 2011-2015. A mother-fixed-effect model together with the spatiotemporal variation of earthquakes in Chile allow us to deal with identification issues that have obscured previous estimates. Our findings show that prenatal maternal stress seems to affect fetal growth, because infants born to mothers exposed to earth tremors in early and/or mid gestation are more likely to be large for gestational age. The estimates suggest that relatively poorer Chilean mothers are more vulnerable to earthquakes, because their babies seem to drive the reported impacts on fetal growth. We discuss and provide evidence that suggests a possible mechanism that explains the varying results across socioeconomic status. Mothers with diabetes and/or hypertension are more likely to have large-for-gestational-age babies. Exposure to earth tremors seems to increase the incidence of these afflictions among the affected population, with the observed impact on diabetes being relatively higher among women with lower socio-economic status.


Suggested citation: Alvarez-Aranda, R., S. Chirkova, J. G. Romero, (2018), 'Growing in the Womb: The Effect of Seismic Activity on Fetal Growth', Nota di Lavoro 30.2018, Milano, Italy: Fondazione Eni Enrico Mattei

Download file
Download PDF file

FEEM Newsletter & Update

Subscribe to stay connected.

Your personal data will be processed by Fondazione Eni Enrico Mattei. – data Controller – with the aim of emailing the FEEM newsletter & Update. The use of Your email address is necessary for the implementation of the newsletter service. You are invited to read the Privacy Policy in order to obtain additional information about the protection of Your rights.

This Website uses technical cookies and cookie analytics, as well as “third party” profiling cookies.
If you close this banner or you decide to continue navigating on this Website, you express consent to the use of cookies. If you need additional information or you wish to express selective choices on the use of cookies, please refer to the   Cookie PolicyI agree