The worlds heaviest twins, with an aggregate weight of 12.58 kg (27 lb 12 oz), were born to Mary Ann Haskin (USA), of Fort Smith, Arkansas, USA on 20 February 1924.
Jack and Isla O'Kane could be the biggest naturally born twins in the country weighing in at 4.245kg and 3.2kg respectively.
Twins and triplets often don't have a chance to reach a healthy weight before they're born. While the average single baby weighs 7 pounds at birth, the average twin weighs 5.5 pounds. Triplets typically weigh 4 pounds each, and quads weigh 3 pounds each.
In addition, previous studies have shown that first-born twins are, on average, taller and heavier than second-born twins until adolescence (Silventoinen et al., 2007; Pietiläinen et al., 2002).
The median twin-to-twin delivery interval time was 19 min (range 2–399 min) and 68% of all second twins were delivered within 30 min.
Guinness don name one Canadian brother and sister dem born at 22 weeks as di world most premature twins. Adiah and Adrial Nadarajah wey dem born at 126 days, overtake di previous record of 125 days early set for 2018 by twins for di US state of Iowa.
Twins with different birthdays are rare, and the chance of twins being born in different years is 1 in 2 million, according to the news release by Natividad. Though the incident is rare, it's not the first time twins have been born in separate years.
The fetus with more blood flow is called the recipient twin, and the fetus with less is called the donor twin. Because the donor twin has less blood flow, this baby grows slower and is smaller.
Knowing which twin is the older one is usually a no-brainer. The time of birth is recorded, and whichever one is born first is officially the eldest.
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).
The World Record of 'longest interval between two twins' was achieved by the twin children of Peggy Lynn of Huntingdon, Pennsylvania. These twins were of opposite sex and they were named Hanna (girl) and Eric (boy). These twins were born 84 days apart.
Monoamniotic-monochorionic Twins
These types of twins share a chorion, placenta, and an amniotic sac. This is the rarest type of twin, and it means a riskier pregnancy as the babies can get tangled in their own umbilical cords.
As per the university, MoMo twins are some of the rarest types of twins, making up less than one per cent of all births in the United States. According to Dr Gupta, MoMo twins account for “fewer than 0.1 per cent of all pregnancies and one per cent of identical twins”.
In Australia, twins happen in 1 in every 80 births. This means that 1 in 40 Australians is a twin. The birth rate of identical twins is the same around the world and doesn't vary with the mother's age.
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.”
Can twins have different fathers? In rare cases, fraternal twins can be born from two different fathers in a phenomenon called heteropaternal superfecundation. Although uncommon, rare cases have been documented where a woman is pregnant by two different men at the same time.
In the case of pregnancy continuation, the dead twin will progressively transform into “fetus papyraceous” due to the absorption of the soft tissues, placental and amniotic fluids. The dead fetus will be found compressed between the amniotic sac of the survival twin and the uterine wall [3].
This is why fraternal twins run in families. 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.
However, since only women ovulate, the connection is only valid on the mother's side of the family. While men can carry the gene and pass it on to their daughters, a family history of twins doesn't make them any more likely to have twins themselves.
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.
Born on Either Side of Midnight
Babies that are born close to midnight may arrive on different days. For example, Twin A may be born at 11:59 pm on one day while Twin B doesn't make an appearance until 12:01 am, which would be the next day.
They come from the same fertilized egg and share the same genetic blueprint. To a standard DNA test, they are indistinguishable. But any forensics expert will tell you that there is at least one surefire way to tell them apart: identical twins do not have matching fingerprints.
In ancient times, the Yoruba viewed twins with suspicion, and sometimes sacrificed them. But now twins are considered lucky. In contrast to the Western view, the firstborn twin is considered the younger of the two. The Yoruba believe that the "senior" twin sent the younger one out first to scout the world.