[Association of maternal isolated thyroid peroxidase antibody positive in the first trimester with fetal growth].

Objective: To investigate the association of isolated thyroid peroxidase antibody (TPOAb) positive in the first trimester with fetal growth.

Methods: A total of 16 446 pregnant women were included in the birth cohort study, whose last menstrual period was between May 2016 and April 2019 and with singleton pregnancy. Maternal serum samples were collected when they firstly came for prenatal care in the first trimester.

[Secular trends of premarital medical examination in China during 1996 and 2013].

Objective: To describe the secular trends of premarital medical examination (PME) in China during 1996 and 2013 and to assess the impacts of national health policies on the PME rate.

Methods: The information on marriage and PME for districts and counties in 31 provinces of China was annually collected by the Office for National Maternal & Child Health Statistics of China, and the information on the health policies was from official governmental websites. According to the main health policies, the calendar years were categorized into 3 periods: 1996 to 2003 was mandatory PME period; 2004 to 2008 was encouraged voluntary PME period; and 2009 to 2013 was free-paid voluntary PME period.

[The method and efficacy for screening neonatal tetanus in high risk areas in China].

Objectives: To establish a method for screening neonatal tetanus (NT) in high risk areas in China using multi-sources data.

Methods: We adopted six NT-related indicators from National Notifiable Disease Report System (NNDRS) and National Maternal and Child Health Annual Report System, to calculate weighted high-risk score at prefecture level in 2010 and 2011. And we selected the top 30 high risk cities, and compared the scores with the actual NT incidence ranking and WHO scoring.