is it possible to be pregnant with twins and have two different fathers?
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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. Ordinarily, a woman becomes pregnant because one of her eggs has been fertilized by sperm.
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Twins being born with different fathers is an extremely rare occurrence known as heteropaternal superfecundation. Women usually have to have sex with two different men within a day before or after ovulation for both eggs to be fertilised.
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Your chances of having fraternal twins may be higher if you're a fraternal twin yourself or if fraternal twins run on your mom's side of the family. ... (It can also happen once in a while in women who don't regularly release more than one egg or have twins in their family, though.)
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The Times said the phenomenon of twins or triplets having different fathers can occur when a woman, having ovulated at least twice in the same cycle, sleeps with more than one man within 24 hours and conceives children by them. ... The children, one of whom died after an illness in 2001, are now 10.
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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.
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Here are the different types of multiple births: Superfecundation twins: When a woman has intercourse with two different men in a short period of time while ovulating, it's possible for both men to impregnate her separately. In this case, two different sperm impregnate two different eggs.
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Fraternal (dizygotic) twins, meanwhile, occur when two separate eggs are fertilized by two separate sperm. ... The answer is yes, but only in cases in which they're fraternal, as identical twins form from a single egg/sperm combination and thus cannot have different fathers.
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Do Identical Twins Have the Same DNA? Although two fetuses develop simultaneously in superfetation, they differ in maturity, having been conceived days or even weeks apart. Superfetation is observed in animal reproduction, but it is exceedingly rare in humans. Only a few cases are documented in medical literature.
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According to the NHS, the chances of a woman getting pregnant with two sets of non-identical twins while using the pill and the implant is a crazy one in three billion. And it's so rare, even The Multiple Births Foundation said they had "never heard of this happening before".
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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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The only way to confirm a twin or multiple pregnancy is by visually identifying the multiple fetuses with ultrasound. If your doctor or caregiver can only see one baby, it is not likely that you're having twins or multiples. ... After 20 weeks, a second fetus should be clearly visible on ultrasound.
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Around two in three sets of twins are fraternal. Two separate eggs (ova) are fertilised by two separate sperm, resulting in fraternal or 'dizygotic' (two-cell) twins. These babies will be no more alike than siblings born at separate times.
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If you are pregnant, the odds of multiple births are as follows: Single baby: 89% Twins: 10% Triplets: 1%
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Only one ovulation can happen per cycle. You can, however, ovulate two (or more) eggs at the same time. When this happens, there is the potential to conceive fraternal (non-identical) twins if both eggs are fertilized. But having two separate eggs released at different times within the same cycle doesn't happen.
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Having identical twins is not genetic. On the other hand, fraternal twins can run in families. ... However, for a given pregnancy, only the mother's genetics matter. Fraternal twins happen when two eggs are simultaneously fertilized instead of just one.
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Twins with different birthdays is a rare occurrence. Twins with different birth years even more so.
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A female dog can have as many different fathers for her puppies that bred with her. ... Each puppy will get half of it's DNA makeup from Mom and one Father, but since often dogs have litters it's possible for two puppies from the same litter to have 2 different sires.