Like for their twin parents, there are many fascinating family relationships for the children of twins–when identical twins have children, their children are cousins but genetically as similar as
Since identical twins share the same DNA, the children of two pairs of identical twins are legally cousins, but genetically more similar to siblings.
Brittany Salyers told USA TODAY they have "quaternary twins" which is when two children are born less than nine months apart to identical twin mothers and identical twin fathers. The Salyers are parents to Jett, who turned 1 in January, and Jax, who will turn 1 in April.
Potential health complications in a twin pregnancy
Women with twin pregnancies are more likely to have pregnancy health problems and complications like gestational diabetes, pre-eclampsia, premature labour and bleeding. Twins who share a placenta might have extra complications.
This rare phenomenon is known as quaternary twins. It happens when identical twin females marry identical twin males and have babies at the same time.
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.
While it's tempting to wonder whether your twins might sleep better together, the only safe snoozing setup is to place each baby in his own crib or bassinet. Sticking with safe sleep guidelines is always crucial, but it's especially important for twins.
A little more than half of twin pregnancies end in preterm delivery (before 37 weeks). While 40 weeks is the full gestation period of the average pregnancy, most twin pregnancies are delivered at approximately 36 weeks (range 32-38 weeks depending on the type of twin pregnancy).
To form identical or monozygotic twins, one fertilised egg (ovum) splits and develops into two babies with exactly the same genetic information. To form fraternal or dizygotic twins, two eggs (ova) are fertilised by two sperm and produce two genetically unique children.
Yes, you read that right. Twins (non-identical) can be born at completely different times, sometimes even years apart.
Two sisters were shocked - and delighted - to discover that not only were they both pregnant at the same time, they were both also expecting twins. The double pregnancies came as a shock to Megan O'Brien, aged 29, and sister, Sara Seyler, age 32, as twins do not run in the family at all.
Incest (/ˈɪnsɛst/ IN-sest) is human sexual activity between family members or close relatives. This typically includes sexual activity between people in consanguinity (blood relations), and sometimes those related by affinity (marriage or stepfamily), adoption, or lineage.
Such twins, known scientifically as 'MoMo', an abbreviation for monoamniotic-monochorionic, are some of the rarest types of twins, making up less than one percent of all births in the United States, noted the statement. It also stressed that such MoMo twin pregnancies have a high risk of fetal complications.
If they're all fraternal twins the children would be double cousins, but not any more similar than if the parents were regular siblings. If one set is fraternal and one identical the cousins would be genetically a bit closer than half-siblings.
Twin pregnancy timetable milestones
The second milestone is 28 weeks, when viability skyrockets. Ninety percent of babies who make it to this stage of gestation survive. Long-term complications — including cerebral palsy, vision and breathing problems — are still a possibility, however.
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That's not all, Monga says. Women pregnant with twins complain of more back pain, sleeping difficulties, and heartburn than those who are carrying one child. Being pregnant with twins also carries a higher rate of maternal anemia and a higher rate of postpartum hemorrhage (bleeding) after delivery.
Twins had increased perinatal mortality, with the odds being over 2.5 times higher at 34-37 weeks compared to birth after that up to 39 weeks. When competing risks were analyzed, stillbirth risk was markedly less than the risk of neonatal death at 34 and 35 weeks, while the reverse held good after 37 weeks.
About one third of all twins are born vaginally and the process is similar to that of giving birth to a single baby. If you're planning a vaginal delivery, it's usually recommended that you have an epidural for pain relief.
Professor Monden explained that, “The twinning rate in Africa is so high because of the high number of dizygotic twins – twins born from two separate eggs – born there." He continued, “This is most likely to be due to genetic differences between the African population and other populations.”
According to the Office on Women's Health , women who are aged 30 years or older are more likely to conceive twins. The reason for this is that women of this age are more likely than younger women to release more than one egg during their reproductive cycle.
It's even possible to carry both of your babies at the same time! So if people have already been telling you, “You've got your hands full!” they're right. Twins will keep your hands (and your heart) full. But don't worry, a baby carrier will give your hands some freedom.
Vanishing twin syndrome was first recognized in 1945. This occurs when a twin or multiple disappears in the uterus during pregnancy as a result of a miscarriage of one twin or multiple. The fetal tissue is absorbed by the other twin, multiple, placenta or the mother. This gives the appearance of a “vanishing twin.”
Talk to both children and try to understand their concerns, and discuss solutions together. However, we would always recommend that boys and girls older than 10 do not share a room.