1.School of Health and Social Caring, Shanghai Urban Construction Vocational College, Shanghai 201415, China;
2.NO. 1 Middle School of Taiping Town, Guangxi Zhuang Autonomous Region, Tengxian 543300, China;
3.Department of Pediatric, Xinxiang Maternal and Child Health Hospital, He′nan Province, Xinxiang 453003, China
Abstract：Objective To explore the associations of pre-pregnancy body mass index (BMI), pregnancy weight gain and newborn weight. Methods From March 2016 to March 2017, 441 women were selected from Xinxiang Maternal and Child Health Hospital who set birth health card within 12 weeks of pregnancy, had undergone regular childbirth and delivered a single birth. And the data of their pre-pregnancy BMI, pregnancy weight gain and newborn weight were observed and analyzed. Results Among the 441 pregnant women, 73.7%, 14.1%, 10.6% and 1.6% were normal, low weight, overweight and obese before pregnancy, respectively. The pregnancy weight gain was normal, insufficient and excessive, accounting for 40.6%, 38.1% and 21.3%, respectively. The difference in the degree of weight control in pregnancy was highly statistically significant in different pre-pregnancy BMI groups (P < 0.01). Among the 441 newborns, the normal birth weight, low weight and giant children accounted for 89.8%, 6.1 % and 4.1 %, respectively. BMI before pregnancy and pregnancy weight gain had significant effects on newborn weight (P < 0.01), but there was no significant interaction between them (P > 0.05). Conclusion BMI before pregnancy and pregnancy weight gain are closely related to newborn weight. Pregnant women who are thin and overweight before pregnancy and those who gain too much or too little weight should control their weight within an appropriate range to promote maternal and child health.
2018, Vol. 15 
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