月经周期正常，但经量很少是什么原因

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正常的月经量为30-60毫升之间，少于30毫升就被视为月经量少。女性一旦月经不调，就说明女性正常的生理过程发生了故障，使女性正常的排卵功能不能得到很好的运作，就会使精子无法正常的与卵子结合，无法形成受精卵。　　

使月经量变少的原因有哪些？

1血液中垂体催乳素（PRL）升高抑制卵巢功能低下。可表现为月经稀发经量减少，无排卵和黄体功能不足最后闭经。　　

2液中卵泡刺激素和黄体生成素过高反馈性抑制卵巢产生雌二醇和孕酮，这种情况称为卵巢功能早衰。它先是出现月经量减少，月经周期后错1—2个月，最后出现闭经。　　

3液中睾酮（雄激素）升高常见于多囊卵巢综合症。睾酮升高可中和血液中雌二醇，使雌二醇减少，影响卵泡的发育和排卵，同时过多的睾酮可妨碍卵泡的正常发育，而促使其萎缩和闭锁。　　

4内分泌原因，比如各种激素分泌异常或不排卵等。　　

5子宫内膜本身的原因，比如子宫内膜结核引起内膜病变或人工流产、刮宫引起子宫内膜薄等。

所以建议您到正规的医院检查治疗，希望我的回答对您有所帮助，祝您健康，如有疑问请继续追问。

The US valuable lotus through great writer's advertisement investment and the upscale market's special counter construction, causes the spokesman who oneself become the fashionable tidal current Compared in the Chinese cosmetics market attacks the high-end skill to be insufficient, takes the populace route to flow in the popular goods domestically produced brand, the US valuable lotus has obtained the unification in the contradiction 2003 year mid-December, the US valuable lotus has held a activity in New York, celebrates its Chinese Branch to start the profit This distance US valuable lotus enters Chinese market already in the recent 8 years But the Chinese market's profit, looks like in the US valuable lotus, is a successful matter At the same time, possesses the Multinational corporation which develops in China to be the same likely, US valuable lotus most recent several years management, what are more is pays great attention the market development and the channel construction, but is not take gains as the first goal; On the other hand, along with to the Chinese market understanding's gradual deepening, the US valuable lotus has located itself, no matter in recent years were the brand management or the channel construction, more and more tallied with the Chinese national condition In the populace cosmetics market, today's US valuable lotus already occupied the market absolute initiative in the Chinese home, covers Paulo according to Oulaiya China company chairman “the Pyramid type strategy”, the US valuable lotus is continued to locate for the populace consumable The US valuable lotus had a slogan “to let each Chinese women have a US valuable lotus's product at least” In order to serve this purpose, the US valuable lotus formulated had the affinity price to the Chinese ordinary consumers US valuable lotus lipstick's price basic superior in 30-60 Yuan this sector But Shiseido's similar products price above 100 Yuan, looks like SK mostly Ⅱ Such brand, Similar products' price is US valuable lotus's 10 times nearly Along with the SARS time's reduction behavior, the US valuable lotus's product more and more can expend in the price for the populace, in theirs promotion, the individual type's lipstick price even already lowered to 10 Yuan, must be lower than the majority of domestically produced brand's price, this stimulated greatly to the price has been sensitive, but had the pursue name brand trend low end consumer the US valuable lotus is take the female as the goal expense community's brand, but when purchases the cosmetics, what the female most pays attention is the product brand, its proportion relative high Therefore, although is the price not high popularity product, but the US valuable lotus actually pays attention sets up own brand image the advertisement takes enhances the brand popularity and the loyalty method effectively, is valued cosmetics enterprise's But the cosmetics consumer is also easiest is about the advertisement institute community Therefore, in 1999 until now, cosmetics advertisement continuously by its strong delivery tendency hold advertisement market front row Compares with its competitor, the US valuable lotus feminine launches a psychological attack to the present age to fight is more overbearing and is swift and fierce Opens a fashionable publication casually and turns on the television, may see the US valuable lotus the advertisement It is reported that the US valuable lotus's once occupied the Chinese overall cosmetics advertisement investment in advertisement investment 1/2 to adapt Chinese's esthetic taste, the US valuable lotus invited inland star Zhang Ziyi in April, 2001 to take the post of its Asian vivid spokesman, attempted by her health contour, the fresh makings, the enchanting charm to deduct the US valuable lotus to be compatible, fashion, vigor, vitality brand image although US valuable lotus in price and channel aspect more and more popular, but because its brand image maintains quite well, the consumer has not reduced to its brand fine reputation and the loyalty Moreover, because has the formidable brand image support, the US valuable lotus product produces goods rate has been high, can provide the stable repayment to the dealer, even if therefore yields profit for the dealer is lower than the competitor far, various dealers are willing to cooperate with them has the formidable rallying point brand, to proliferate the price which each corner the sales network, the majority of consumers can accept, the low cost of operation, the US valuable lotus's in domestic market start profit is merely “the start