Gungor Yildirim

CONFLICT OF INTEREST STATEMENT The authors declare no conflicts of interest. DATA AVAILABILITY STATEMENT The dataset used in this study is not publicly available because it was obtained through field-based sampling, institutional permissions and collaborative research effort. Data access requests may be directed to the corresponding author and will be considered subject to ethical, institutional and permission-related restrictions.

1 Introduction Previously, it was believed that the uterus remained sterile during pregnancy and that it became contaminated with nonspecific bacteria from animals and the environment postpartum. Current evidence, however, suggests that the uterus is not sterile and houses specific microorganisms, or commensal bacteria, that adapt to the endometrium. Still, compared to the microbiota of the intestine or vagina, the uterine microbiota is less abundant in terms of microbial composition (Chen et al.

1 INTRODUCTION The number of buildings constructed has gradually increased with the rapid development of the construction and industrial sectors. Due to frequent changes in urban planning and earthquake disasters, construction and demolition waste (CDW) has increased significantly in recent years and has become a severe environmental problem in many countries worldwide.1, 2 Therefore, the assessment of CDWs is of great importance in reducing environmental pollution and ensuring sustainability.