"It has to do with how much baby skin leads onto the umbilical cord from the baby's body. Less skin makes an innie; more skin makes an outie." About 90 percent of people have innies, and the rest are outies. Herein, why do belly buttons look different?
The belly button outcome is random. Once the umbilical cord is cut, the cord will dry up and fall off. The most popular explanation is that the difference between innies and outies is due to where the umbilical cord is cut and that extra skin left from the umbilical cord may cause the protrusion of an outie.
Furthermore, why do humans have belly buttons but animals don t? While mammals do have belly buttons, they're a little harder to find. Since mammals are gestated inside their mothers, they are all born with umbilical cords. When they emerge, the mother chews off the cord with her teeth, leaving a flat scar that is less noticeable than a human's navel.
Keeping this in view, is it normal for your belly button to change shape?
Your belly button shape can change — under one special circumstance, pregnancy. “The expansion of the abdomen can cause some “innie” belly buttons to pop out and become outies, but most often, there is not much change in the structure itself,” says Dr. Jaffe.
Can you fix an outie belly button?
An outie belly button is a cosmetic issue and doesn't require surgery. Granulomas need to be treated to avoid infection. Hernias usually disappear on their own and those that don't can be treated with a simple surgical procedure after the age of 4 or 5.
Related Question Answers
Do guys like belly buttons?
According to a study at the University of Missouri, small, T-shaped belly buttons are the most attractive. Researchers showed pictures of innies, outies, and belly buttons of all shapes and sizes to a group of men and women who rated them on a scale of 1 to 10 from least to most attractive. Is innie or outie genetic?
"It has to do with how much baby skin leads onto the umbilical cord from the baby's body. Less skin makes an innie; more skin makes an outie." About 90 percent of people have innies, and the rest are outies. Is it bad to pick your belly button?
If you pick at any body part enough to cause an infection then it is possible for an untreated infection to be fatal. Do belly buttons smell weird?
Bacteria and other germs create the foul smell, just as they make your armpits smell when you sweat. The deeper your belly button is, the more dirt and germs can build up inside it. The result of this mix of bacteria, dirt, and sweat is an unpleasant odor. Is innie or outie more common?
Innies are much more common. Only about 10 per cent of people have an outie! But 100 per cent of people have a belly button! Are Outies unattractive?
People take their cues about you based on your belly buttonAccording to a paper in The FASEB Journal, people prefer navels that are T-shaped or oval, and vertical with a little hooding. While outies are considered unattractive, it may come of surprise that innies that are too deep are also given the cold shoulder.
What your belly button says about you?
WHETHER you ended up with an innie or an outie, your belly button is with you for life. While the shape of that little (or not so little) dent in your navel is determined by how the umbilical cord heals and scars, apparently it says a lot about the type of person you are. What causes innie or outie?
Most people end up with innies, but some people have outies. Outies usually occur when more of the umbilical cord is left when it's cut, leading to more skin left over once it dries out. In some rare cases, outies are caused by a condition known as an umbilical hernia. What is the black thing in my belly button?
Omphaloliths. As dead skin cells and sebum — the oil secreted by your skin — accumulate in your bellybutton, they can form an omphalolith over time. Also known as a navel stone, they're made of the same materials that form blackheads. The surface of a navel stone will turn black from oxidation. Are humans the only species with belly buttons?
Q: Belly buttons are a curious feature of the human physique. Only placental mammals will have belly buttons. Marsupials, such as kangaroos, koalas and opossums, give birth to relatively underdeveloped young. Before they are born, they get their nutrients from a yolk sac in their mother's womb. Why do humans have to cut the umbilical cord?
Doctors traditionally cut the cord so quickly because of long-held beliefs that placental blood flow could increase birth complications such as neonatal respiratory distress, a type of blood cancer called polycythemia and jaundice from rapid transfusion of a large volume of blood. Do dolphins have belly buttons?
Yes, all dolphins are born with belly buttons. Unlike humans, dolphins have smooth belly buttons, so their bodies are streamlined. A dolphin's belly button marks the spot where the umbilical cord connected him or her to the mother's placenta inside the womb. Do other animals have periods?
Apart from humans and our close relatives, the only animals that menstruate are elephant shrews and certain bats. Why do dogs not have belly buttons?
The size of the canine umbilical cord is small. The puppy's umbilical scar heals into a small slit, rather than a round hole. Furthermore, this area is soon after covered with fur, which makes it more difficult to find. The dog's belly button does not look like the human belly button. Why don t animals have periods?
Instead of shedding the uterine lining, most animals just reabsorb it back into their bodies. Humans, it's thought, are different because our uterine lining is thicker and thus can't be fully reabsorbed. Do bats have belly buttons?
Humans aren't the only ones with belly buttons. With a few exceptions, nearly all mammals have navels because of mom's umbilical cord, and bats are no different. Did Adam and Eve have a belly button?
Adam was molded from spit and clay and Eve from Adam's rib. They weren't born of woman, so how could they have navels? Yet they'd look pretty silly without them. Artists often dodged the question by extending fig leaves over the lower belly. Do dogs have belly buttons?
As it turns out, dogs do indeed possess belly buttons, as do cats, rabbits, goats, horses and, of course, humans. “All mammals have a belly button (i.e. navel, umbilicus) with the exception of marsupials (like kangaroos) and egg-laying mammals such as the duck-billed platypus,” Casal says. Do all pregnant belly buttons pop?
A: It doesn't happen to all pregnant women. But sometimes a growing baby in the uterus can put so much pressure on a woman's abdominal wall that her normally “innie” belly button becomes an “outie.” It typically happens in the second or third trimester of pregnancy, most commonly around 26 weeks. How much does it cost to turn an outie into an innie?
The procedure does come with some risks of infection, bleeding, and bruising, and there's always a chance that you end up "with a shape that isn't pleasing," Russo says. As for the cost, the procedure typically costs around $1,000. Are all outie belly buttons hernias?
An "outie" is typically a belly button with a small umbilical hernia. Umbilical hernias are more common in infants and in certain populations, including premature infants and blacks. Most umbilical hernias in infants are small and close spontaneously, usually within a couple of years. Do umbilical hernias go away?
Most of the time, a hernia that starts before 6 months of age will go away by 1 year of age. But some children get or still have an umbilical hernia when they are infants or toddlers. Umbilical hernias almost always close on their own as a child grows. But sometimes surgery is needed. Are belly buttons genetic?
They aren't the result of the way a doctor cut or clamped the umbilical cord. They also aren't the result of the way your parents cared for the little umbilical cord left over after you were born. In his book, Dr. Mohamed Fahmy calls the umbilical cord an “anatomical wild card.” What causes umbilical hernia?
An umbilical hernia can develop when fatty tissue or a part of the bowel pokes through into an area near the navel. In adults, factors that can contribute to developing an umbilical hernia include: being overweight or obese. straining while moving or lifting heavy objects. When should I be concerned about an umbilical hernia?
Your doctor will recommend surgery right away if: You have pain, a swollen belly, or other signs of a rare but major problem called strangulation or incarcerated hernia. This can occur when the intestine gets trapped in the hernia sac and loses its blood supply. Why do we have belly buttons?
Your belly button marks the spot where your umbilical (say: um-BIL-ih-kul) cord was once attached. This cord is a soft, bendable tube that carried nutrients — vitamins and minerals — from your mother to you, back when you were in her belly (womb). A belly button is also called a navel. 
