Women’s pelvises differ – How is childbearing change?

Women’s standards have become more likely to be found in the last 150 years, according to a study of more than 8000 people from three countries. There are many reasons for playing, but regardless of the last factor, it is the latest piece of evidence leading to evolution in the pelvis of the pelvis

We do not know exactly what drives this change, or in all ways it will affect people’s health. But if the islands retain at this speed, it can be Caesarean sections that may have a host to knock-on effects.

Maciej Henneberg At the University of Adelaide in Australia and his colleagues have changed a 1247 women in Australia, born between 1900 and 1984, and found that the width of the pelvic in one year. Also, between 3486 Polish women, pelvis widths reduced to 0.47mm annually between 18,4200, and 197. At the same time being extended and 1970.

“Given that in different regions, it develops in the same direction, even if the body’s length increases, I personally find it convincingly,” as Philipp Mitterocker at the University of Vienna in Austria.

“Dataset is good,” as Lia Betti at the University College London.

For Henneberg, this found shows that modern medicine weakens the impact of the natural choice of human pelvis – and especially in the breastfeeding gutter. In the past, when a child is very large or the drainage drain is more narrow, the mother and child may die in childbirth. However, secure and effective Caesarean sectionsor C-Sections – where the child has been removed by the operation by stomach – means that this pressure of evolution is lowered. As a result, breeding canals and pelvises can be found more.

Mitteroouker also thought of c-sections that changed the evolution of the work pressure in the ditch of birth. He predicted it could bring pelvises to find An analysis of 2016and says this is the most recent healing of a long-term event.

“The midwifery is old,” he said, and “it is very unique to people”. Women get help with childbirth, often from other women, In hundreds of thousands of years. This cultural has Relax the pressure to choose the canal of pelvis and identity – So our behavior affects our own biological evolution. “C-section is, in a way, a serious form,” as mutterocker. C-Sections stopped at the beginning of the 1970s to the 1990s, with increasing worldwide 7 percent in 1990 to 21 percent of 2021.

However, Betti doubted that c-sections are the main explanation for the recent change in pelvic width. He pointed out that people were higher at the same time, but maybe because of food and better health care – not a change in evolution of our genes.

“We know that food can affect pelvis,” says Betti. If nutrition is lacking, our physical advancements are likely to spend many nutrients in some organs, including the brain, at the cost of others. But now there is a lot of nutrition, so our bodies can have a lot of nutrients. “So we finished various proportions of the body,” Betti said. “That’s possible.”

Finding an explanation for our narrow islands can help us understand why human birth is very difficult – that brings us back to obstetrical dilemmas. However, the exact nature of the dilemma opposed. In a 2024 study, the mitterouker and his colleagues found that Pelvic floor, not walkingPerhaps the key driver leads to lack: wider chicks increase high pressure on the pelvic floor, which extends the risk of sputaps and incontinence.

Or two influences can work. A study of 31,000 peoplepublished in April, linked wider islands of easy childbirth, but also walking and more dangerous to pelvic floor conditions.

Have more influences on this dilemma. Betti argues that our pelvises are sensitive to Many environmental reasonslike temperature. Other researchers describe a “New Obstetrical Dilemma“Linked to increases in obesity rates, which can make children greater. The real response is probably Betti: Some researchers reblogging the dilemma as a”Multifactor pelvis“.

The narrower islands affect human health. They will make vaginal breeding more difficult, which can bring more c-sections. “Who knows how long to get the situation without children born naturally?” States Renata Henbergpart of the team behind the wife of new research and Maciej Henneberg.

At the same time, the narrower islands can reduce the risk of the pelvic floor problems, which can be very harmful. Childbirth, Betti said, there is “less pleasing, lasting effects, which affect a woman’s negative life”.

However, she says predicting what will happen is difficult, again because so many factors are in play: People are having fewer children, which might reduce the risk of injury, but they are also having them later. “Many things have changed at the same time,” he said.