For the most part, twins and multiples share the same birthday. However, depending on the time of day the babies are born and how long the timespan is between each baby's birth, twins can be born on different days.
Calling them Irish twins is just an informal way of classifying siblings that are born close together. Twins are two children born from the same conception, carried during the same pregnancy, and born together, either on the same day or a day or so apart.
One in 2 million: Twins born on different day, month and year - The Jerusalem Post.
Rebecca Lawrence and Christina Keefer delivered their babies just hours apart. For the past 23 years, identical twin sisters Rebecca Lawrence and Christina Keefer have shared a birthday, and now their children will too.
The longest interval between the birth of twins is 90 days, in the case of Molly and Benjamin West, dizygotic (fraternal) twins born in Baltimore, Maryland, USA to parents Lesa and David West (all USA) on 1 January and 30 March 1996.
Roughly two-thirds of identical twins from between 4 and 8 days after fertilization. Identical twins that likely split from days 9-13 after fertilization: These twins share one amniotic sac, one chorion and one placenta. Only 1-2% of all twins split this late in development.
In 5% of the MZT cases, the splitting occurs 8-13 days after fertilization, resulting in monochorionic-monoamniotic twins (one placenta and one amniotic sac). Rarely, the splitting occurs after 13 days, resulting in conjoined twins.
#1 Fraternal twins can be conceived as much as 24 days apart
For this reason, fraternal twins can be conceived a few weeks apart, though they generally will be born at the same time.
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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.
(CNN) - A British mom gave birth to “super twins” she conceived three weeks apart, a condition known as superfetation. It's so uncommon that there are only a handful of cases documented in the entire world. Baby Noah spent his earliest weeks all alone.
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 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.
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.
Monoamniotic-monochorionic Twins
This is the rarest type of twin, and it means a riskier pregnancy as the babies can get tangled in their own umbilical cords. If you have monoamniotic-monochorionic twins, your healthcare provider will monitor your pregnancy closely.
The Dutch Twins are Kit and Kat, 5 years old and not yet big enough to be called by their real names, Christopher and Katrina. They live in a typical Dutch household, around the turn of the last century. The book follows their day-to-day adventures and accidental mishaps.
The hardest thing about having twins is...
“Managing the movement of two babies. Carrying them both up and down the stairs, getting them into the car, etc.” —Simeon R. “Often having to make one baby wait!” —Catharine D. “Being outnumbered—the logistics of two on one is definitely the hardest.
As expected, first-born twins had greater birth weight than second-born twins. With respect to height, first-born twins were slightly taller than second-born twins in childhood.
Some say that twins are always hard (yet amazing), while others say they truly didn't find them to be difficult. A few said that the first two months with twins are easy (being in the rose-colored glasses phase), then reality hits from months 3-6 (when the sleep deprivation catches up), then it can get easier again.
Fraternal twins, in which each of two eggs is fertilized by a different sperm cell, occur in about four of every 1000 births. About half of those result in male-female twin pairs.
Superfetation is a phenomenon that occurs when a pregnant woman releases an egg, usually a few weeks into her pregnancy, and it's fertilized and implants in the uterus. The result is two separate pregnancies happening at the same time.
What is it? 'Mirror image' is a type of identical twinning. It can happen in any type of identical twins. When the split occurs late - more than a week after conception - the twins can develop reverse asymmetric features. This term is not really a type of twin, just a way to describe their physical features.
A lot of people want to think that the separation between twins is like a wall. It is actually more like a bedsheet hanging on a clothesline. The babies can nudge each other and kick each other. But they cannot directly touch each other because of the flimsy membrane.