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Copyright of Shandong Medical Journal is the property of Shandong Medical Health Newspapers and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Silicone Material is the property of Silicone Material Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Shandong Medical Journal is the property of Shandong Medical Health Newspapers and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Objective To explore the serumbone metabolismindexes in parturient women related to seasonal changes， and to guide maternal diet and calcium supplementation in different seasons．Methods 40 parturients who were admitted in the department of obstetrics and gynecology of the third people's hospital of yunnan province from November 2017 to October 2018 were selected as subjects for the bone metabolism related indexesdetection. According to the time of admission， 40 parturient women were divided into two groups: winter and spring group (n＝20) from November 2017 to April 2018， and summer and autumn group (n＝20) from May 2018 to October 2018.The serum levels of 25-hydroxy vitamin D， osteocalcin and serum calcium in 36 －42(d) postpartum of the 2 groups were compared. Results There were significant differences in 25-hydroxy vitamin D (33.64±8.51 and 28.32±9.78) ng/mL and osteocalcin (5.47±4.13 and 4.22±3.45) ng/mL between the two groups (P<0.05) .Meanwhile， there was no significant difference in serum calcium (2.20±0.35 and 2.16± 0.21) mmoL/L (P> 0.05) . Conclusion There were significant seasonal differences in serum levels of 25-hydroxyvitamin D and osteocalcin between 36-42 (d) postpartum in summer and autumn group and winter and spring group. [ABSTRACT FROM AUTHOR]