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| Analysis of the related factors influencing the placental weight of women with full-term singleton pregnancy |
| Beijing Obstetrics and Gynecology Hospital, Beijing Maternal and Child Health Care Hospital, Capital Medical University, Beijing, 100026 |
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Abstract To analyze the influencing factors of placental weight of women with full-term singleton pregnancy. Methods: A retrospective study was conducted to collect the clinical data of pregnant women with singleton pregnancy who had received regular health care and delivered in term from January to December 2020. According to the placental weight of the women, these women were divided into group A (women with low placental weight), group B (women with normal placental weight), and group C (women with over placental weight). The related factors affecting placental weight of the women were analyzed. Results: A total of 10318 women with full-term singleton pregnancy were in this study, which included 605 (5.9%) women in group A, 8709 (84.4%) women in group B, and 1004 (9.7%) women in group C. The placental weight (590±109 g) of the women deliveried during 37 gestatioanl weeks was significantly lower than that (629±117g) of the women delivered during other gestational weeks, and the placental weight of the women delivered during 41 gestational weeks was significantly higher than that of the women delivered during other gestational weeks (P＜0.05). Maternal advanced age, multipara, male infants, assisted reproduction, prepregnancy overweight or obesity, excessive weight gain during pregnancy, abnormal glucose metabolism, and scarred uterus of the women were all the influencing factors of their placenta overweight. Primipara, female infants, low pregnant weight, and low weight gain during pregnancy of the women were all the influencing factors of their placenta underweight (all P＜0.05). Conclusion: The placental weight is affected by the advanced age, parity, fetal sex, mode of conception, pre-pregnancy body mass index, gestational weight gain, pregnancy with abnormal glucose metabolism, and scar uterus of the pregnant women.
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