Kang TsuiChing-Wen ChangHenk-kien AuYi-Yi ChienLi-Wei Chien2026-06-042026-06-042001-09https://203.71.86.71/handle/123456789/46116en-US北醫出版品新臺北醫學期刊New Taipei Journal of MedicineNTJMFertility Trends in Mainland China,1970~2000journal article