OBJECTIVE: To investigate whether female sub-health conditions and reproductive diseases areassociated with pregnancies and labors.METHODS: A cross-sectional survey was performed by using a structured questionnaire. A total of 1343 women aged 35 years or younger in six urban areas of Chengdu were included in the study.According to the Screening Criteria of sub-health conditions, these women were categorized into three groups: postpartum healthy group,sub-healthy group, and reproductive disease group. Data were double-entered using EpiData and the nanalyzed by SPSS.RESULTS: Pregnancy and labor were correlated with postpartum sub-health conditions. The number of pregnancies was negatively correlated with women's postnatal health but was positively correlated with the incidence of postpartum reproductive diseases.CONCLUSION: The number of pregnancies and labors is probably an important factor leading to sub-health conditions and the occurrence of reproductive diseases in women. Avoiding or reducing unwanted pregnancies and labors, enhancing the awareness of health among child bearing-age women are effective measures for preventing sub-health conditions.