不孕症共同的临床表现为夫妻规律性生活1年，未避孕未孕。不同病因导致的不孕症可能伴有相应病因的临床症状。 See more
1991 (MCMXCI) was a common year starting on Tuesday of the Gregorian calendar, the 1991st year of the Common Era (CE) and Anno Domini (AD) designations, the 991st year of the 2nd millennium, the 91st year of the 20th century, and the 2nd year of the 1990s decade. It was the final year of the Cold War, which had begun in 1947. During the year…
影響身心健康的原因數不勝數，有些比較明顯 - 比如，如果白天不好好進食可能會情緒不佳；運動可能會讓人更有活力。 一些研究顯示，可能還有其他一些不太直截了當的互動。
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不孕的原因 - 1991 年 -
