As we all know, people's secondary sexual characteristics only begin to manifest when they enter adolescence. Girls are usually earlier than boys. Europeans developed earlier and faster than Asians, while blacks developed earlier and faster. This may be because of the relationship between living in the cold zone and the tropics for a long time. However, most yellow people living in temperate zones develop relatively late. It is often said abroad that "girls are eight years old and boys are nine years old." But if you are in China, you are precocious. Need immediate treatment. In China, girls usually start puberty at the age of eleven or twelve, while boys usually start to develop at the age of thirteen or fourteen. The author himself is a man, and he began to develop at the age of twelve, which can be said to be early. Probably because I ate too many chickens when I was a child, I didn't grow up when I was fourteen. It has something to do with my premature development. But I'm still normal, and many girls I meet are after ten years old at the earliest.

But that's the problem. Oriental girls don't develop as early as western girls, but they are never as late as many people think! Many men think that a girl's pubic hair hasn't grown well at the age of sixteen, just because she is a boy who develops late and has never seen the development process of a girl.

Decades ago, many girls in China didn't have menstrual cramps until they were sixteen, but it is rare today. The average age of menarche for girls in China today is about thirteen years old. But many of them came when they were eleven or twelve years old. It is not that we are precocious, but that people in the past developed after lacking nutrition.

Now let me briefly talk about the development process of girls:

Under normal circumstances, girls begin to show signs of fame after they are ten years old. When they are ten to eleven, their height and weight will soar. So girls tend to surpass boys at this time. At this time, the breast has changed. The nipple will bulge slightly. The nipple color will change a little, and pubic hair will begin to grow. Of course, it is still very sloppy. After the age of eleven or twelve, the breasts will bulge. At this time, the pubic hair is already very thick, but it is not as long as that of adults and is not widely distributed. The external genitalia will also begin to change. Some people think that when a girl grows up, her labia will be exposed, but it actually varies from person to person. When we look at the photos on the Internet, we will find that some people 18 years old are still retracting their labia. Some people show their hidden lips at nine o'clock. In fact, this is just a personal difference. The exposure of labia is not closely related to puberty development. It may even be that the labia was exposed when I was a child, and in my teens, I "shrank" back because of my body shape change. Generally speaking, after a girl enters puberty, will the appearance of the vulva change obviously, just like a boy's penis and a man's penis, but the size is different, and there is not much difference. Of course, the color and proportion of vulva will change a little, but it also varies from person to person.

But one thing is right, that is, when a girl is born, the vulva is always a crack. As for later, some people have larger labia and some people have larger clitoris. These changes are very complicated and do not necessarily begin in adolescence. Just like our noses and eyes are big and small.

From the appearance, when the breasts and genitals develop to a certain extent, there will be menstruation. In a deeper sense, women's menstruation is the beginning of the maturity of internal reproductive organs such as ovary and uterus. In other words, of course she can have children.