1 Odds ratio adjusted for relationship dissatisfaction, age, level of education, income, marital status, social support other than partner, smoking, maternal depression, breastfeeding, the sex of the
The results from epidemiologic studies linking blood folate concentrations, folic acid supplementation, or dietary folate to the risk of preterm birth are inconsistent. In this study, we aimed to summ
Pregnancy weeks stratified as being either during influenza season or post-influenza season; no causal protective associations are expected in the post-influenza season period.
