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Can a woman get pregnant from two different guys at the same time

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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. Usually, these cases only become known for legal reasons, when a man is questioning whether he is the biological father.

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SEE VIDEO BY TOPIC: My twins have two different fathers! - The Maury Show

The Science of How Women Can Have Twins With 2 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. 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. Live Science. Please deactivate your ad blocker in order to see our subscription offer.

Meet the billion to one twins who have different fathers

She is the first to admit her boys are like chalk and cheese. Cheeky Marcus, her son by Michael, is short and stout, red-haired with bundles of energy. His twin Lucas, her son by Tommy, is taller, blonde and has a more gentle, calm manner. We got on well and began to see each other. Worried she might jeopardise her fledgling relationship with Tommy, Charlotte kept quiet about what had happened.

Medical practitioners and the ordinary citizen are becoming more aware that we need to understand cultural variation in medical belief and practice. The more we know how health and disease are managed in different cultures, the more we can recognize what is "culture bound" in our own medical belief and practice.

Can you get pregnant if you are already pregnant and would the result be twins? Superfetation is the formation of a fetus while another fetus is already present in the uterus. Essentially, it describes a situation where a woman becomes pregnant when she is already pregnant. It is believed that this is a very rare event and only a few cases have been reported and verified.

A Chinese woman just had twins with 2 different fathers — here’s how that’s possible

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. Fraternal twins are born when women ovulate two healthy eggs and both get fertilised. But it is also possible for two eggs to be ovulated during the same cycle and fertilised at different points within the five-day fertility window resulting in twins. What this means is that each egg can be fertilised by different sperms. Marcus was fathered by Michael and Lucas by Tommy. Charlotte, who already had two sons by Michael Nielsen, divorced him in August

Mother gives birth to twins with different dads

C onstance Wu, of Crazy Rich Asians , is in talks to star in a new romcom. Apparently, her character is a bit ditzy — a classic romcom trope. But this ditziness will lead to what I am fairly sure will become a new romcom trope: heteropaternal superfecundation. He explains that heteropaternal superfecundation occurs when a woman gives birth to twins with different biological fathers.

A woman in China has reportedly given birth to a pair of twin boys found to 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.

Superfecundation

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?

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.

Superfetation: Twins Conceived at Different Times

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? As technology has improved the accuracy and accessibility of genetic testing, people have been able to receive genetic testing to determine when fraternal twins have two different fathers. Fraternal twins are the result of hyperovulation , the release of multiple eggs in a single cycle. Superfecundation describes a situation in which each of the eggs are fertilized by sperm from different men, leading them to have different biological fathers making the twins half-siblings.

Dec 11, - First, a woman can release two eggs at the same time. To have two successful candidates from two different men in a month when two eggs.

Superfecundation is the fertilization of two or more ova from the same cycle by sperm from separate acts of sexual intercourse , which can lead to twin babies from two separate biological fathers. Homopaternal superfecundation refers to the fertilization of two separate ova from the same father, leading to fraternal twins ; [3] while heteropaternal superfecundation is referred to as a form of atypical twinning where, genetically, the twins are half siblings. Superfecundation, while rare, can occur through either a complex single occurrence of sexual intercourse, separate occurrences of sexual intercourse, or through artificial insemination. Superfecundation most commonly happens within hours or days of the first instance of fertilization with ova released during the same cycle. The time window when eggs are able to be fertilized is small.

How can a set of twins have completely different fathers?

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. There it happens when a woman releases two eggs in a cycle.

Woman gives birth to twins with 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:.

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Strange but true: Twins can have different fathers

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