According to Chang Sheng-ping's estimate, 80 % of patients receiving the aid of in vitro fertilization suffer from blocked fallopian tubes. Ten percent suffer adverse troubles in the membrane wall of the uterus. The remaining patients seek help because of reproductive problems of the male partner, uneasily determined pregnancy problems, etc.
根據張升平的估計，接受試管嬰兒手術幫助的，有八十％是輸卵管阻塞的病人，十％是子宮內膜異位症患者，其餘尚有男性不孕、不明原因的不孕症…… 等。