000151599 001__ 151599
000151599 005__ 20251017144608.0
000151599 0247_ $$2doi$$a10.1080/1081602X.2025.2466487
000151599 0248_ $$2sideral$$a143342
000151599 037__ $$aART-2025-143342
000151599 041__ $$aeng
000151599 100__ $$aLiczbinska, Grazyna
000151599 245__ $$aUncommon sex ratio at birth during the Second World War: evidence from Poland
000151599 260__ $$c2025
000151599 5060_ $$aAccess copy available to the general public$$fUnrestricted
000151599 5203_ $$aThis study analyses the evolution of sex ratios at birth in the Polish city of Poznań during World War II. The analysis is based on a sample of over 13,500 unique observations from 1935 to 1944, sourced from the Gynaecology and Obstetrics Clinic of the Medical University of Poznań. Logit regressions were applied to explore the relationship between the probability of a baby being male and various explanatory variables: years before and during WWII, maternal marital status, place of residence, occupation (either the mother’s or her husband’s), maternal age at delivery, and the number of previous deliveries. The findings indicate that during WWII, more boys were born alive than girls, compared to the years preceding the conflict. Among the variables examined, only birth order had a significant impact on sex ratios at birth. Additionally, the study suggests that gestational age may have played a crucial role during WWII, contributing to the higher number of live-born boys compared to girls, as pregnancies tended to end pre-term during the war. This research contributes to the ongoing exploration of sex ratios at birth under acute environmental conditions and highlights those severe conditions experienced by pregnant mothers during WWII adversely affected pregnancy outcomes.
000151599 540__ $$9info:eu-repo/semantics/embargoedAccess$$aby-nc-nd$$uhttps://creativecommons.org/licenses/by-nc-nd/4.0/deed.es
000151599 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/acceptedVersion
000151599 700__ $$0(orcid)0000-0002-8150-9823$$aMarco-Gracia, Francisco J.$$uUniversidad de Zaragoza
000151599 7102_ $$14014$$2480$$aUniversidad de Zaragoza$$bDpto. Economía Aplicada$$cÁrea Hª e Instituc.Económ.
000151599 773__ $$g(2025), 1-24$$pHISTORY OF THE FAMILY$$tHISTORY OF THE FAMILY$$x1081-602X
000151599 8564_ $$s645561$$uhttps://zaguan.unizar.es/record/151599/files/texto_completo.pdf$$yPostprint$$zinfo:eu-repo/date/embargoEnd/2026-08-28
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000151599 909CO $$ooai:zaguan.unizar.es:151599$$particulos$$pdriver
000151599 951__ $$a2025-10-17-14:16:00
000151599 980__ $$aARTICLE