Smoking status and maternal weight trajectories during pregnancy and postpartum: Preliminary results from a pilot study.

Objective: To preliminarily examine throughout pregnancy and 12 months postpartum: 1) the critical timings of abnormal gestational weight gain (GWG) among quitters and non-quitters; 2) the consequences of abnormal GWG on weight retention during postpartum; 3) the potential difference in GWG by timing of quitting (early vs. late).

Methods: We included 59 pregnant smokers (49 quitters and 10 non-quitters) from two clinical pilot studies.

Associations of COVID-19 lockdown with gestational length and preterm birth in China.

Background: The effects of COVID-19 lockdown measures on maternal and fetal health remain unclear. We examined the associations of COVID-19 lockdown with gestational length and preterm birth (PTB) in a Chinese population.

Methods: We obtained medical records of 595,396 singleton live infants born between 2015 and 2020 in 5 cities in Guangdong Province, South China.