It matters mostly legally and for novelty, as the first twin born is technically older, but biologically they're the same age; the minutes difference rarely impacts personality, though some studies find slight physical differences (firstborns slightly bigger) and some twins feel birth order creates competition, while others find it insignificant, with many parents downplaying it to foster equality.
As a parent of twins, I'm pretty sure that you know the answer to the question “which twin is older?” It is, of course, the child that was born first.
Despite the clinical impression that firstborn twins do better than second-born twins, recent reports have shown no difference in perinatal mortality between them.
In twin babies, who is older? Legally, the one who comes out first. Realistically, if a glob of cells splits into two portions and each portion becomes a human being, you can't declare one older than the other. Even in fraternal twinning there's no way to know which egg was fertilized first.
The participants drew attention to the differences in their birth order (one twin is always slightly older than the other by a few minutes), with the elder usually seen as more dominant.
The strongest bond you have as siblings is growing up together.. If by chance, any of your blood brother or sister was taken to village or city to live with others for years, while you live with your parents, that bond is somewhat already affected. This is the danger of seperating children.
For a given pregnancy, the odds of conceiving fraternal twins are only determined by the mother's genetics, not the father's. Fraternal twins happen when two eggs are simultaneously fertilised instead of just one.
In physics, the twin paradox is a thought experiment in special relativity involving twins, one of whom takes a space voyage at relativistic speeds and returns home to find that the twin who remained on Earth has aged more.
Doctors suggest waiting at least 18-24 months between pregnancies for healthy outcomes for both parent and baby. The ideal age gap between siblings varies and has its pros and cons depending on family dynamics and personal preferences.
Heteropaternal superfecundation is an extremely rare phenomenon that occurs when a second ova released during the same menstrual cycle is additionally fertilized by the sperm cells of a different man in separate sexual intercourse taking place within a short period of time from the first one 1-4.
So the question of going past 38 weeks on day six of that week (6/7) doesn't come up that often! But for those who do get there, the best data available suggests that at 38 to 39 weeks, the risk of stillbirth for twins seems to be higher than the risk of neonatal death after delivery.
A daisy baby is another name for babies with TTTS. The Twin-to-Twin Transfusion Syndrome Foundation coined the term after its founder planted daisy seeds with her surviving twin son in their backyard. The daisy field is a symbol of hope that all babies affected by TTTS will survive.
While both fraternal and identical twins outperformed their non-twin counterparts, identical twins showed even greater gains in life expectancy over fraternal twins, leading scientists to theorize that identical twins perhaps form deeper bonds due to an enhanced ability to predict their sibling's needs.
A typical, single pregnancy lasts about 40 weeks, but a twin pregnancy often lasts between 35 to 37 weeks. More than half of all twins are born prematurely (before 37 weeks), and the risk of premature delivery increases with higher-order multiples.
With respect to height, first-born twins were slightly taller than second-born twins in childhood. After adjusting the results for birth weight, the birth order differences decreased and were not statistically significant anymore.
Bell's study showed that within a pair of identical twins, the twin aging faster biologically also had greater declines in memory and thinking skills by midlife.
Is time dilation is real? Yes, and there have been many experiments and observations confirming its existence. Humans have never traveled at velocities over which time dilation would become plain to the naked eye. That would require velocities that were a significant portion of the speed of light.
THE paradox of Einstein, Podolsky and Rosen [1] was advanced as an argument that quantum mechanics could not be a complete theory but should be supplemented by additional variables. These additional vari- ables were to restore to the theory causality and locality [2].
Monochorionic-monoamniotic twins are identical twins that share both a placenta and an amniotic sac. This is the rarest and highest risk form of twin pregnancies.
There are many different kinds of twins, including fraternal twins (two eggs and two sperm), identical twins (one egg and one sperm), mirror image identical twins (separation on day 5 of development), identical twins with two placentas, one placenta and two sacs, one placenta and one sac, and finally conjoined ...
“In most cases, one of the twins was almost always more dominant and more in control than the other.
Fraternal twin pregnancies result from hyperovulation of the mother. The father's sperm does not decrease or increase the chance of having twins. Skipping a generation can happen in some cases, depending on whether the twins are boys or girls.
Not always. One studyOpens a new window found that 15% of identical twins have some genetic variations due to mutations – that is, changes in DNA. That study found a relatively tiny number of mutations between identical twins (5.2 on average).
In other words, twins on the father's side of the family will have no influence on your chances of having twins. It's possible, though, that if Dad inherited the gene for hyperovulation, he could pass that gene onto daughters, increasing their chances of twinning – and yours of having twin grandchildren.