can you have twins with two different dads?
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It is possible for twins to have different fathers in a phenomenon called heteropaternal superfecundation, which occurs when two of a woman's eggs are fertilized by sperm from two different men. ... Identical twins occur if that fertilized egg divides into two separate eggs, early in the pregnancy.
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Identical twins are either both male or both female so cannot conceive a child together except by some dramatic genetic engineering. Even if two female identical twins had children by the same father their children would not be completely genetically identical.
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Having identical twins is not genetic. On the other hand, fraternal twins can run in families. Genetics can definitely play a role in having fraternal twins. For example, a woman that has a sibling that is a fraternal twin is 2.5 times more likely to have twins than average!
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“They can be either fraternal, resulting from fertilisation of 4 eggs with 4 sperm, or identical, resulting from a fertilisd egg that splits into 2 or more embryos, or a combination of these,” she says. “In the case of fraternal quadruplets the babies can be of any sex, and they will not be identical.
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Quadruple surprise: Mother pregnant with two sets of identical twins. A husband and wife in Utah just found out they're about to be parents of quadruplets. Even more rare, the babies are two sets of identical twins. ... Ashley and Tyson Gardner told CNN they've tried unsuccessfully for eight years to get pregnant.
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Identical (monozygotic) twins happen when a single egg (zygote) is fertilised. The egg then divides in 2, creating identical twins who share the same genes. Identical twins are always the same sex, so if your twins are identical, you'll have 2 girls or 2 boys.
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With identical twins, one egg is fertilized by one sperm, and the embryo splits at some later stage to become two. Occasionally, two sperm are known to fertilize a single egg; this 'double fertilization' is thought to happen in about 1% of human conceptions.
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Absolutely not. There are numerous cases of DIPG affecting twins and even triplets where only one child is affected. The risk for the others is as rare as for any individual child to manifest DIPG.
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However, only women ovulate. So, the mother's genes control this and the fathers don't. This is why having a background of twins in the family matters only if it is on the mother's side. And why your son's family genetics did not play a role in his twins.
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While IUI alone will not increase the risk of twins, the use of fertility medication does make it more likely that patients will have a multiples pregnancy. If a woman releases multiple mature eggs at ovulation, it is more likely that more than one egg will be fertilized, thus resulting in twins or multiples.
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Identical twins don't generally run in families, but fraternal twins do. It looks like twins “skip a generation” in some families. ... If you are a male DZ twin and there are other DZ twins in your family, you do not have an increased chance of having DZ twin children.
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In rare cases, two eggs can be fertilized at different times during two or more acts of sexual intercourse, resulting in fraternal twins with two different fathers, called bipaternization. Monozygotic, or identical twins, occur when one fertilized egg splits into two separate embryos.
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The chances of having identical twins is relatively rare — around 3 or 4 in every 1,000 births. And while it may be obvious, identical twins are always the same sex, either both boys or both girls, at birth. Why? Well, they don't just look alike — they also share the exact same DNA.
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In fact, they have the same DNA! So no, conjoined twins with different fathers is not possible. ... The end result is not two separate, connected people but one person with a mix of both twins. Some of the chimera's cells have the DNA of one twin and the rest have the DNA of the other.
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They Can Be Different Genders or the Same Because fraternal twins originate from separate conceptions, they can be boys, girls, or one of each (just like a singleton baby). ... 2﻿ As a result, the chances of fraternal twins resulting in boys, girls, or a combination are the same as for any other baby.
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Non-identical, or dizygotic, twins occur when two separate eggs are fertilised, each by a different sperm, and develop in the womb at the same time. These twins can be the same or different sexes and are no more alike than any brother or sister, despite being born together.
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Originally Answered: Can two people born like two years apart, be twins? No. Twins are genetically identical siblings or siblings born from the same pregnancy.