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I think so. My twins are three days apart according to every ultrasound so far. It seems perfectly reasonable that they could be up to a week apart especially considering that is about how long strong sperms keep on working within the right environment. I am not a Dr., but my guess would be it must be possible. Take care

While it is possible for non-identical (dizygotic/2-eggs) twins to be conceived apart (and by different fathers!), it's generally not the case. An ultrasound showing twins differing in age by 3 days is not significant given the margin of error for ultrasound technology. Just like most adults are different sizes, so too are babies in utero owing to genetic and environmental factors.

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Q: Can dizygotic fraternal twins be conceived a week apart?
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Related questions

How do dizygotic twins?

Two separate eggs are fertilized. Dizygotic twins are the same as fraternal twins.


What is another name for fraternal twins?

Another name for fraternal twins is dizygotic twins.


What are unidentical twins called?

How do fraternal twins form? Answer one egg from each ovary is fertilized.


What The scientific name for fraternal twins.?

Identical twins are called monozygotic. Fraternal twins are called dizygotic.


Twins who delevelop in separate amniotic sacs?

Twins who develop in separate amniotic sacs are known as dizygotic or fraternal twins. This means they were conceived from two separate eggs fertilized by two different sperm cells. Dizygotic twins can have different genetic makeup and are no more similar than siblings born at different times.


What is the difference between dizygotic twins and monozygotic twins?

Dizygotic twins, also known as fraternal twins, develop from two separate eggs fertilized by two different sperm. Monozygotic twins, also known as identical twins, develop from a single fertilized egg that splits into two embryos. Dizygotic twins are no more genetically similar than any other siblings, whereas monozygotic twins share the same genetic makeup.


What is the frequency of monozygotic twins versus dizygotic twins?

The frequency of having monozygotic twins (identcal) is about 4 out of every 1000 births. Whereas dizygotic twins (fraternal) is about 12 out of every 1000.


How may types of twins are there and which type may have different sex?

There are two types of twins -- monozygotic ("identical") from a single egg, and dizygotic (fraternal) from two eggs. Only dizygotic twins can have a different sex.


What combinations would be needed to cause the development of dizygotic twins?

Dizygotic twins, also known as fraternal twins, result from the release and fertilization of two separate eggs by two separate sperm. Therefore, the combination needed is for a woman to release two eggs during ovulation and for both eggs to be fertilized by different sperm, leading to the development of dizygotic twins.


What is the definition for fraternal twins?

Fraternal twins are twins who develop from two separate fertilized eggs. They can be of the same or different genders and share about 50% of their genetic material. Fraternal twins are also known as dizygotic twins.


What happens to a pregnant women for her to have twins?

Twins can be identical or fraternal (monozygotic or dizygotic). For identical twins, one sperm fertilizes an egg. The zygote divides into two identical embryos. For fraternal twins, two separate eggs are fertilized. They both implant on the uterine wall, forming two zygotes.


Does 2 sacs and one placenta mean fraternal twins?

No, 2 sacs and one placenta usually indicates the twins are identical, or monozygotic twins. Fraternal twins, or dizygotic twins, typically have separate placentas as well as separate sacs.