Correlation between contraceptive use before pregnancy and the days of pregnancy: a cohort study based on propensity score matching

YU Jing-yun; GAN Zhan-peng; JIANG Bi; ZENG Si-liang

doi:10.3969/j.issn.1006-3110.2021.06.005

YU Jing-yun, GAN Zhan-peng, JIANG Bi, ZENG Si-liang

Practical Preventive Medicine ›› 2021, Vol. 28 ›› Issue (6) : 658-660.

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Practical Preventive Medicine ›› 2021, Vol. 28 ›› Issue (6) : 658-660. DOI: 10.3969/j.issn.1006-3110.2021.06.005

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Correlation between contraceptive use before pregnancy and the days of pregnancy: a cohort study based on propensity score matching

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{{article.zuoZheEn_L}}. {{article.title_en}}[J]. {{journal.qiKanMingCheng_EN}}, 2021, 28(6): 658-660 https://doi.org/10.3969/j.issn.1006-3110.2021.06.005

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Received	Published
2020-06-14	2021-06-15
Issue Date
2021-07-16

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