Can a woman become pregnant with twins from two different fathers
Siblings can have different fathers; can twins born of a woman have two fathers? The straight answer is yes. It is often assumed that for twins, both eggs were fertilized during a single act of intercourse. However it is quite possible for one egg to be fertilized during one act of intercourse, and the other during another if the woman has intercourse with two men within hours. Normally, women ovulate only one healthy egg per cycle.SEE VIDEO BY TOPIC: Fraternal Twins Fathered By Two Different Men? (Full Episode) - Paternity Court
SEE VIDEO BY TOPIC: Surrogate learns one of the 'twins' she was carrying is her biological childContent:
- Strange but true: Twins can have different fathers
- The Science of How Women Can Have Twins With 2 Different Fathers
- Mother gives birth to twins with different dads
- How can a set of twins have completely different fathers?
- Is It Possible for Twins to Have Different Fathers?
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- Types of Twins
Strange but true: Twins can have different fathers
A California woman became pregnant while she was already pregnant, in an extremely rare case that resulted in her carrying "twins" with two different sets of parents. The year-old woman, Jessica Allen, agreed to be a gestational surrogate for a Chinese couple that she met through a surrogacy agency in southern California, according to the New York Post.
In April , doctors used in vitro fertilization to produce an embryo for the Chinese couple, and implanted that embryo in Allen's uterus. Allen soon became pregnant with the other couple's baby, but at six weeks of pregnancy , she was told she was carrying twins. Allen "was very surprised" to learn she was carrying two babies, she told ABC News.
She believed the Chinese couple's embryo had split in two, making the twins identical, she said. A month after she had given birth to the two babies, she learned that the "twins" were not identical. They looked different, and a DNA test confirmed that one baby was Allen's biological child and the other baby was the Chinese couple's child. Superfetation means that a woman becomes pregnant while she is already pregnant. It's extremely rare — fewer than a dozen cases of superfetation have been reported in the medical literature, said Dr.
Usually, when a woman becomes pregnant, several biological processes kick in that prevent her from getting pregnant a second time during the pregnancy: Her body releases hormones that halt ovulation the release of an egg from the ovaries ; a "mucus plug" develops in the cervix, which prevents sperm from traveling to the uterus; and the lining of the uterus changes, making it hard for another embryo to implant, Aftab said.
But with superfetation, a woman continues to ovulate after she becomes pregnant, and her ovaries release another egg that is then fertilized, resulting in a second pregnancy. It's important to note that, with superfetation, the two fetuses are different gestational ages, typically just a few weeks apart, Aftab said. This is different from fraternal twins , in which two eggs are fertilized at the same time, and the fetuses are the same gestational age.
Aftab said it's possible that superfetation happens more often than is reported; the condition may go undetected because the two fetuses are so close in age that they are simply considered twins. Allen said she was "floored" when she learned one of the babies was hers.
Allen said she underwent a complicated legal battle to get custody of her son, who was not legally her child when he was born. In February, Allen and her husband, Wardell Jasper, got custody of their son, whom they named Malachi. Because superfetation is so rare, it's difficult to know whether IVF procedures, or surrogacy, can influence the likelihood of the condition, Aftab said.
But these could be questions for future research. In the meantime, this case should be a "reason for pause and thoughtfulness" among physicians and surrogacy organizations, Aftab said. In future surrogacy cases in which a twin pregnancy occurs unexpectedly, it would be in the interest of all parties to rule out superfetation as soon as possible, she said. Original article on Live Science.
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The Science of How Women Can Have Twins With 2 Different Fathers
People are fascinated by twins, and thanks in large part to advances in fertility science, there are more twins than almost any other time in history. Identical and fraternal twins are the most common, but there are also several other rare types. Read on to learn more about twins. Identical twins are also called monozygotic twins, meaning one fertilized egg.
To become pregnant , sperm from a male has to meet an egg from a female. This can happen when a male and female have sexual intercourse, when the penis is in the vagina. If an egg has been released and is in the fallopian tube, one of these sperm may reach the membrane of the egg and get inside it. This process is called fertilisation.
Mother gives birth to twins with different dads
We all know that siblings can have different fathers — technically making them half-siblings — but what about twins? Yes, it can happen. In fact, one study estimates that as many as 1 in sets of fraternal twins is "bipaternal. How is it possible? Simple: Two eggs from the same mother get fertilized by two different fathers — within the same ovulation period. Okay, maybe not so simple. But if your head is spinning, consider that this happens in certain animal species all the time — with more than two fathers! Our canine friends are a clear example.
How can a set of twins have completely different fathers?
But, for a woman in New Jersey suing for child support, things are a little more complicated. It turns out the man she thought was the father of her twins was only the father of one of the pair. Here are the different types of multiple births:. In this case, two different sperm impregnate two different eggs.
Soon after the birth of her twin babies, a Chinese woman and her husband noticed something strange — the two babies looked pretty different, and only one resembled the husband. Following a DNA test, the couple learned that the babies were actually from two different fathers and the mother then revealed she had a previous one-night stand, Vice reported. Although cases like this are rare, they do happen. The phenomenon is known as heteropaternal superfecundation.
Is It Possible for Twins to Have Different Fathers?
A woman in China has reportedly given birth to a pair of twin boys found to have different fathers. It is said that the husband had felt strange as he thought one of the boys didn't look like him, and after they received the result, he had to question his wife over and over for her to tell the truth. A mother in China has given birth to a pair of twin boys from different fathers file photo.
Twins occur when two babies are born to one mother after a single pregnancy. Each embryo then develops into a separate fetus. Fraternal dizygotic twins, meanwhile, occur when two separate eggs are fertilized by two separate sperm. Unless a set of twins' birth mother served as a surrogate or used donor eggs , there would be no question that she's the mother of both twins. But you may be left wondering: Can twins have different fathers?
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A California woman became pregnant while she was already pregnant, in an extremely rare case that resulted in her carrying "twins" with two different sets of parents. The year-old woman, Jessica Allen, agreed to be a gestational surrogate for a Chinese couple that she met through a surrogacy agency in southern California, according to the New York Post. In April , doctors used in vitro fertilization to produce an embryo for the Chinese couple, and implanted that embryo in Allen's uterus. Allen soon became pregnant with the other couple's baby, but at six weeks of pregnancy , she was told she was carrying twins. Allen "was very surprised" to learn she was carrying two babies, she told ABC News.
Yes they can. It sometimes happens in the lab when two different men's sperm are added to a dish with a woman's eggs. But it can happen in nature too.
Types of Twins
But that's what she got — along with two beautiful boys — when she gave birth to twins of different fathers nearly a year ago. They like to play with their older brothers. Their two dads How did it happen?