No. 38 Xueyuan Road
Haidian District
Beijing, Beijing 100871
China
Peking University - Department of Epidemiology and Biostatistics
Folic acid supplementation, perinatal mortality, stillbirth, early neonatal death, neonatal death
Insomnia, Passive smoking, Polycyclic aromatic hydrocarbons, Single nucleotide polymorphisms, Housewives
COVID-19, pregnancy outcome, neonatal outcome, uninfected pregnant women