Why do women have periods?

2024/04/2620:29:12 history 16995647

Why do women have periods? - DayDayNews

Why do women have periods? - DayDayNews

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Yinglong, named Gengchen, is a kind of winged dragon. It is a creature in ancient Chinese legends. It was transformed from mountains and rivers. It has supreme fighting power and once gave birth to phoenix and unicorn. In the Battle of Zhuolu, he helped Huangdi Xuanyuan fight aga - DayDayNews

Yinglong, named Gengchen, is a kind of winged dragon. It is a creature in ancient Chinese legends. It was transformed from mountains and rivers. It has supreme fighting power and once gave birth to phoenix and unicorn. In the Battle of Zhuolu, he helped Huangdi Xuanyuan fight aga

The hero of the Battle of Zhuolu, Yinglong

05/19 1241

After Liu Bang entered Xianyang and the Qin Palace, he saw the splendid palace and the beauties from all over the country. He immediately couldn't move and decided to stay in the Qin Palace that night to experience what it's like to be an emperor. pleasure. - DayDayNews

After Liu Bang entered Xianyang and the Qin Palace, he saw the splendid palace and the beauties from all over the country. He immediately couldn't move and decided to stay in the Qin Palace that night to experience what it's like to be an emperor. pleasure.

Why did Xiang Bo inform Liu Bang?

05/18 1972

To talk about the root cause, the direct reason is the emperor's trust in the power struggle. The deeper reason is the shortcomings in the political structure of the Ming Dynasty. The deposed prime minister concentrated power but relied heavily on the cabinet, which led to an unb - DayDayNews

To talk about the root cause, the direct reason is the emperor's trust in the power struggle. The deeper reason is the shortcomings in the political structure of the Ming Dynasty. The deposed prime minister concentrated power but relied heavily on the cabinet, which led to an unb

Intensive Reading of Ming History Series·The most disabled man controls the greatest power and the most wealth

05/19 1408

In August 1930, due to careless communication, the Kuomintang authorities became suspicious, and Kuomintang agents arrested Zhang Laoxiao, manager of the Li Nong Feng Dung Farm. Although Zhang Laoxiao is not a member of the Communist Party, he knows the people he often meets at t - DayDayNews

In August 1930, due to careless communication, the Kuomintang authorities became suspicious, and Kuomintang agents arrested Zhang Laoxiao, manager of the Li Nong Feng Dung Farm. Although Zhang Laoxiao is not a member of the Communist Party, he knows the people he often meets at t

[Memory of Zhaozhou] The establishment and development of the Communist Party organization in Zhao County (Part 2)

05/19 1124

In modern times, we can actually see that war has a huge impact on a country. But there are exceptions to this. The most typical one is after 1962. Why did India not converge? - DayDayNews

In modern times, we can actually see that war has a huge impact on a country. But there are exceptions to this. The most typical one is after 1962. Why did India not converge?

Why didn’t India “conquer” after 1962?

05/19 1342

Song Jing has an upright personality. The advantage is that he can avoid evil tendencies. The disadvantage is that he easily offends people, and he only offends people who are quick-witted and good at taking shortcuts. For example, there was a phenomenon at that time: "First, env - DayDayNews

Song Jing has an upright personality. The advantage is that he can avoid evil tendencies. The disadvantage is that he easily offends people, and he only offends people who are quick-witted and good at taking shortcuts. For example, there was a phenomenon at that time: "First, env

Past Events in the Tang Dynasty (366): The sudden appointment to run for office will not work, and the boss will also lose an opportunity to receive gifts.

05/19 1299

Li Guinian, a musician of the Tang Dynasty, was hailed as the "Music Saint of the Tang Dynasty" by later generations. He was a native of Bairen, Xingzhou. He was good at singing and composing. He was also a master of Zhuozhen and Jiegu. As a music master, Li Guinian was highly so - DayDayNews

Li Guinian, a musician of the Tang Dynasty, was hailed as the "Music Saint of the Tang Dynasty" by later generations. He was a native of Bairen, Xingzhou. He was good at singing and composing. He was also a master of Zhuozhen and Jiegu. As a music master, Li Guinian was highly so

Datang Internet celebrity Li Guinian's circle of friends includes Du Fu, Wang Wei...

05/19 1109

Mother Shyamala Gopalan immigrated to the United States from Tamil Nadu, India, while father Donald J Harris immigrated to the United States from Jamaica. - DayDayNews

Mother Shyamala Gopalan immigrated to the United States from Tamil Nadu, India, while father Donald J Harris immigrated to the United States from Jamaica.

Are ancestors more important, or the motherland? An Indian who serves as Vice President of the United States will tell you the answer

05/19 1369

It is the first kingdom of the Uyghurs in history. It has many different names, such as Di Li, Chile, Ding Ling, and later the name given to it by historians of the Northern Dynasties and the Sinicized Xianbei - Gaoche. - DayDayNews

It is the first kingdom of the Uyghurs in history. It has many different names, such as Di Li, Chile, Ding Ling, and later the name given to it by historians of the Northern Dynasties and the Sinicized Xianbei - Gaoche.

Why was Gaoche, the first kingdom in Uyghur history, so bullied and only existed for 54 years?

05/19 1334

In the sixth year of Jingyao of the Shu Han Dynasty (AD 263), the Shu Han regime founded by Liu Bei perished. When a country dies, a group of its old dignitaries will naturally be unlucky, and Shu Han is no exception. What is more typical is that the family of Guan Yu, the patria - DayDayNews

In the sixth year of Jingyao of the Shu Han Dynasty (AD 263), the Shu Han regime founded by Liu Bei perished. When a country dies, a group of its old dignitaries will naturally be unlucky, and Shu Han is no exception. What is more typical is that the family of Guan Yu, the patria

Why was the Guan Yu family destroyed after the fall of the Shu Han Dynasty? Will Pang avenge his father? There is actually a hidden story behind it

05/18 1761

Every year during the New Year's Day, the Mongolian feudal lords would lead groups of caravans to Beijing to sell local specialties and buy groceries, silks, cloths, etc. in Beijing. Sometimes as many as thousands of Mongolians came to Beijing as tribute envoys. - DayDayNews

Every year during the New Year's Day, the Mongolian feudal lords would lead groups of caravans to Beijing to sell local specialties and buy groceries, silks, cloths, etc. in Beijing. Sometimes as many as thousands of Mongolians came to Beijing as tribute envoys.

Cold knowledge about the Qing Dynasty - the relationship between the Qing Dynasty and Mongolia

05/19 1702

During the Qing Dynasty, there were many ethnic groups in China, and the Han nationality was still the largest ethnic group in China. The Manchus were a minority, but they were the dominant ethnic group at that time. In addition, there are many ethnic minorities who have played v - DayDayNews

During the Qing Dynasty, there were many ethnic groups in China, and the Han nationality was still the largest ethnic group in China. The Manchus were a minority, but they were the dominant ethnic group at that time. In addition, there are many ethnic minorities who have played v

Cold knowledge about the Qing Dynasty - the relationship between the Qing Dynasty and Mongolia

05/19 1180

Gao Huan, Emperor Shenwu of the Northern Qi Dynasty (496-547), was named He Liuhun in Xianbei and his ancestral home was Bohai Diaogui (south of Jingxian County in present-day Hebei Province). A powerful official in the Northern Dynasties and the Eastern Wei Dynasty. Because his - DayDayNews

Gao Huan, Emperor Shenwu of the Northern Qi Dynasty (496-547), was named He Liuhun in Xianbei and his ancestral home was Bohai Diaogui (south of Jingxian County in present-day Hebei Province). A powerful official in the Northern Dynasties and the Eastern Wei Dynasty. Because his

Northern and Southern Dynasties——Gao Huan

05/19 1793

Menwei means family status, and refers to a family that has been distinguished for generations. The concept of family status has already appeared in the Eastern Han Dynasty. The family clans of big bureaucrats and famous people often have successive officials. For example, the fo - DayDayNews

Menwei means family status, and refers to a family that has been distinguished for generations. The concept of family status has already appeared in the Eastern Han Dynasty. The family clans of big bureaucrats and famous people often have successive officials. For example, the fo

During the Jin, Jin and Southern Dynasties, were the powerful families really so powerful that they could overwhelm the emperor?

05/19 1597

However, although Sun Yat-sen recognized the importance of military struggle very early, he never had the military power he could directly control. However, these warlords did not support Sun Yat-sen, but only engaged in political and military speculation for their own interests. - DayDayNews

However, although Sun Yat-sen recognized the importance of military struggle very early, he never had the military power he could directly control. However, these warlords did not support Sun Yat-sen, but only engaged in political and military speculation for their own interests.

Sun Yat-sen "borrowed money" from Zhang Zuolin many times for the revolution, and wrote many personal letters to express his gratitude.

05/19 1689

For a long period of time in history, the succession of the eldest son has always been followed, whether it is the succession of the family or the change of imperial power. The eldest son is the legitimate son, or the eldest among the legitimate sons. The legitimate son must be b - DayDayNews

For a long period of time in history, the succession of the eldest son has always been followed, whether it is the succession of the family or the change of imperial power. The eldest son is the legitimate son, or the eldest among the legitimate sons. The legitimate son must be b

What kind of person is Li Shimin? The epitaph in his brother Li Jiancheng’s mausoleum reveals the truth

05/19 1628

We all know that during a period of time after ex-rights and dividends, if most people are optimistic about the stock, the trading market price of the stock is higher than the base price on the ex-rights and dividends day, that is, the stock price has increased compared with befo - DayDayNews

We all know that during a period of time after ex-rights and dividends, if most people are optimistic about the stock, the trading market price of the stock is higher than the base price on the ex-rights and dividends day, that is, the stock price has increased compared with befo

[A brief discussion on the inevitability of the stock market of 603599 Guangxin Shares]

05/19 1166

According to data, the current redemption rate of online loans has exceeded 50%, and in some areas it has exceeded 80%. However, the overall lower redemption rate should be mostly in Beijing, Shanghai and Guangzhou. After all, these three regions have more platforms. , there are - DayDayNews

According to data, the current redemption rate of online loans has exceeded 50%, and in some areas it has exceeded 80%. However, the overall lower redemption rate should be mostly in Beijing, Shanghai and Guangzhou. After all, these three regions have more platforms. , there are

Expert Wang Qiang suggested: Jiufu can cash out in advance, and the cash rate will increase more in 2022

05/19 1018

Market review: This week, the SW power equipment sector closed at 11725.82 points, down 1.16%. In the lithium battery new energy vehicle sector, electrolytes rose by 1.82%, cathodes rose by 0.71%, lithium batteries fell by 0.58%, new energy vehicles fell by 0.89%, separators fell - DayDayNews

Market review: This week, the SW power equipment sector closed at 11725.82 points, down 1.16%. In the lithium battery new energy vehicle sector, electrolytes rose by 1.82%, cathodes rose by 0.71%, lithium batteries fell by 0.58%, new energy vehicles fell by 0.89%, separators fell

Some new energy vehicle companies announced sales in June and performed well

05/19 1733

[Source: Yangzhou Radio and Television Yangfan Mobile Channel] In order to further boost market confidence and help enterprise development, Yangzhou City held the second "Discover Treasures" high-quality goods exhibition and sales festival from July 2 to 3, focusing on children's - DayDayNews

[Source: Yangzhou Radio and Television Yangfan Mobile Channel] In order to further boost market confidence and help enterprise development, Yangzhou City held the second "Discover Treasures" high-quality goods exhibition and sales festival from July 2 to 3, focusing on children's

To heat up the summer consumer market, Yangzhou City holds the second "Discover Treasures" high-quality goods exhibition and sales festival

05/19 1811

[Source: Kunming Information Port_Original] Kunming Information Port News reporter Zanjuanjuan On July 2, the 3rd China International Street Dance Competition of Hongdong Dance Forest 2022 was launched at Kunming South Asia Style No. 1 MALL, and officially opened the two-day Sout - DayDayNews

[Source: Kunming Information Port_Original] Kunming Information Port News reporter Zanjuanjuan On July 2, the 3rd China International Street Dance Competition of Hongdong Dance Forest 2022 was launched at Kunming South Asia Style No. 1 MALL, and officially opened the two-day Sout

Hongdong Dance Forest 2022 3rd China International Street Dance Competition launched

05/19 1361

The World Championships also ushered in its finale early this morning. In the men's 10-meter platform final, two players from the Chinese team, Yang Jian and Yang Hao, performed well. Although there were mistakes in some of their movements, But with the difficulty of surpassing, - DayDayNews

The World Championships also ushered in its finale early this morning. In the men's 10-meter platform final, two players from the Chinese team, Yang Jian and Yang Hao, performed well. Although there were mistakes in some of their movements, But with the difficulty of surpassing,

13 gold finals! China’s diving is so strong that it tied with the US team in the gold medal list. Quan Hongchan won 2 gold medals and 1 silver.

05/19 1241