性-人類性的基本層面
Sex
- Basic Aspects of Human Sexuality |
染色體的功能-性發育畸形：表1.1
The Role of Chromosomes - Problematic Developments: Table 1.1 |
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染色體的問題
現代科學研究發現了大量非典型的染色體組合類型。下面描述的僅僅是這中間最要害的組合類型。通常，非典型染色體組合涉及XX或XY的非常規結合。人口中有0.5%-1.0%的發生率。
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女孩
1.
唐納氏綜合征（Turner Syndrome），既僅有單一X染色體存在，第二條不見了（X0）。表現的症狀就是以生長矮小為特徵，卵巢發育不良，缺乏月經，也不能生育。激素治療能最低程度地稍微改善體格外貌。該綜合征的發生率為每3000個活產中有一個。
2. 三聯綜合征（Triple X Syndrome） (XXX),
既除了兩條常規的XX染色體之外，存在著第三條X染色體。患有該綜合征的女孩，和隨後長成的女人，在外表上會和其她女性不同。她可能生育力底下，也可能有精神症狀。該綜合征在每1000個活產中有一個發生率。
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Chromosomal Problems
Modern research has found a number of possible atypical chromosomal conditions. The following
describes only the most important of them. As a rule, they concern deviations from the regular XX- or XY-combination. They are found in ca. 0,5 to 1 percent of the population.
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In Girls
1. The so-called
Turner Syndrome, i.e. only a single X-chromosome is present, the second one is missing (X0). The condition is characterized by stunted growth, a deficient development of ovaries, absent menstruation and absent breast development as well as infertility. Hormonal treatment can at least somewhat normalize the physical appearance. The syndrome is found in one of ca. 3000 live births.
2. The Triple X Syndrome (XXX), i.e. a third X-chromosome is present in addition to the two regular ones. The girl, and later the woman, will not differ from others in her appearance. However, she is likely to be less fertile, and she may also have psychological problems. The syndrome is found in one of ca. 1000 live births.
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