Which is baby A in twins
However, antenatally twins are labeled as A or B according to their location relative to the birth canal. Antenatal labeling is usually established by prenatal ultrasound. Most often, fetuses known in utero as twin A are also first born and thus retain their label.
Which baby is A or baby B twins
In almost 50 percent of twin pregnancies, both babies are positioned head down—or vertex/vertex—when it comes time for labor and delivery. Thirty percent of the time, the first baby (usually called Baby A) is head down, while Baby B is breech, or head up (vertex/breech).
What is the difference between baby A and B
Often, baby A (so named because she's closest to the cervix and therefore likely to be born first) will stay on one side while baby B stays on the other. The less room they have, the less likely they are to move around.
Can a twin be a boy and a girl
Identical, or monozygotic, twins may or may not share the same amniotic sac, depending on how early the single fertilized egg divides into 2. If twins are a boy and a girl, clearly they are fraternal twins, as they do not have the same DNA. A boy has XY chromosomes and a girl has XX chromosomes.
How are twins named A or B
In prenatal ultrasounds, the baby positioned lowest in the uterus is given the designation of “Baby A.” Under this convention, Baby A will likely be born first in a vaginal delivery. However, about 75 percent of twins are delivered by cesarean section.
Can baby B come out first
In general, the infants are still delivered in the order of Baby A followed by Baby B. It's reasonable to imagine instances in which Baby B would need to be delivered first due to health complications, but there does not appear to be a recorded case of this occurring.
How do you know which twin is twin A
In prenatal ultrasounds, the baby positioned lowest in the uterus is given the designation of “Baby A.” Under this convention, Baby A will likely be born first in a vaginal delivery. However, about 75 percent of twins are delivered by cesarean section.
How do they decide twin A and B
For vaginal delivery of both infants, the twins decide birth order by their placement in the uterus. Once the babies are large enough to stay in one position in the womb, the twin lowest in the uterus is known as Baby A and the one furthest from there is Baby B, according to the Stanford Medicine News Center.
What type of birth is best for baby
What type of delivery is best A vaginal delivery is the safest and most common type of childbirth. Vaginal deliveries account for about 68% of all births in the United States. Most medical organizations and obstetricians recommend a vaginal delivery unless there is a medical reason for a C-section.
What is baby blood type
Each biological parent passes down one gene, and the child's blood type is a combination of those genes. Some genes (A and B) are dominant, meaning they will always be expressed. The third gene (O) is recessive, meaning it will be hidden when paired with a dominant A or B gene.
Which twin is older
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.
How rare is boy girl twins
Still, she cautions, a lot more work needs to be done to establish a causal link. 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.
Is twin B ever born first
In general, the infants are still delivered in the order of Baby A followed by Baby B. It's reasonable to imagine instances in which Baby B would need to be delivered first due to health complications, but there does not appear to be a recorded case of this occurring.
Which twin is older when born
first
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.
Who is the eldest in twins
Compute. 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.
Is one twin always dominant
The dominance and submissive behaviour in twins may not be the same under all circumstances. This means, that there is no need for the same twin to be dominant in all scenarios.
What is the rarest twin
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.
Is there always a dominant twin
Twins often exchange dominance throughout their lives, and in that sense may alternate between birth order categories. Aside from inherent personality traits, the impact of birth order in multiples is likely more often one of perception rather than reality, especially in light of recent studies.
Which twin runs in the family
Dizygotic (DZ) twins, also called fraternal twins, occur when two egg cells are each fertilized by a different sperm cell in the same menstrual cycle. DZ twins are about twice as common as MZ twins, and they are much more likely to run in families.
Is baby A or baby B born first
In prenatal ultrasounds, the baby positioned lowest in the uterus is given the designation of “Baby A.” Under this convention, Baby A will likely be born first in a vaginal delivery.
Which birth is safer
vaginal birth
For most women, a vaginal birth is safer and healthier. Vaginal birth cuts the risk for many complications.
What are the 3 rarest blood types
Most Rare Blood TypeAB-negative – 1 %B-negative – 2 %AB-positive – 4 %A-negative – 6 %O-negative – 7 %B-positive – 11 %A-positive – 32 %O-positive – 40 %
Can Type A have O+ baby
Two parents with A blood type can produce a child with either A or O blood types. Two parents with B blood type can produce a child with either B or O blood type. One parent with A and another with B can produce a child with A, B, AB or O blood types.
Which twin lives longer
Fraternal twins
There is one particular power though which twins possess, longevity. Fraternal twins live longer than singletons and identical twins longer still. Male identical twins on average, saw the most benefit. The rarity of twins has inspired many myths about them.
What is the rarest type of twins
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.
