The main cause often cannot be found in many cases of infertility, or treatment is in effective, so that sufferers abandon hope. Yet as soon as their mood clears up or when the husband and wife can get away from work to go on vacation, it's not long before they have good news.
也有許多不孕的個案，始終檢查不出毛病，治療也未見效，待患者放棄希望，心情一放鬆，或夫妻雙雙丟下工作連袂去旅行一趟，卻不久就傳出喜訊。