Monochorionic-monoamniotic twins are identical twins that share both a placenta and an
While there are risks associated with all twin pregnancies, dizygotic (fraternal) twin pregnancies usually bring about the least amount of complications, carrying the lowest risk of all types of twins.
Triplets and identical twins who share a placenta and amniotic sac (Monochorionic monoamniotic or MCMA) are the most likely to experience problems. This is followed by identical twins who share a placenta, but have their own amniotic sacs (Monochorionic diamniotic or MCDA) .
If you're 30 or older, you're more likely than younger people to release more than one egg during a menstrual cycle. You have relatives who have had multiples. If you or other people in your family have had fraternal twins, you may be more likely to have twins, too.
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.
Caesarean section and twins
In the UK, more than half of twins and almost all triplets are delivered by caesarean section is a common method used during twin and triplet births.
Surprisingly, the risk of DS in twins is significantly lower than in singletons due to early fetal loss of DS in multiple pregnancies, particularly in pregnancies concordant for DS (2).
However, for a given pregnancy, only the mother's genetics matter. Fraternal twins happen when two eggs are simultaneously fertilized instead of just one. A father's genes can't make a woman release two eggs. It sounds like fraternal twins do indeed run in your family!
Around two in three sets of twins are fraternal. Two separate eggs (ova) are fertilised by two separate sperm, resulting in fraternal or 'dizygotic' (two-cell) twins. These babies will be no more alike than siblings born at separate times.
Identical twins
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.
Twins develop from embryos to babies like a single baby does. By weeks 10 to 14 of your pregnancy, one or two placentas have formed inside your uterus.
After much research on these cell division errors, researchers know that: In the majority of cases, the extra copy of chromosome 21 comes from the mother in the egg. In a small percentage (less than 5%) of cases, the extra copy of chromosome 21 comes from the father through the sperm.
Studies also show that twins are more likely to suffer from specific health disorders. While they represent just 2 percent of the general population, twins make up 7.4 percent of the nation's cerebral palsy sufferers.
Women who are 35 years or older when they become pregnant are more likely to have a pregnancy affected by Down syndrome than women who become pregnant at a younger age.3-5However, the majority of babies with Down syndrome are born to mothers less than 35 years old, because there are many more births among younger women ...
Mixed-gender twins are the most common type of fraternals, some 50 percent are boy-girl. To understand this combination: Males have XY chromosomes, females have XX chromosomes. You have a girl twin when the father's X chromosome combines with the mother's X chromosome.
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.
Drink Alcohol, Use Drugs, or Smoke. It's never advisable to drink alcohol excessively, smoke, or take drugs, whether you are pregnant or not. When you are pregnant, doing so exposes your unborn babies to toxic substances, raising their risk of birth defects and chronic illnesses.
All men inherit a Y chromosome from their father, which means all traits that are only found on the Y chromosome come from dad, not mom. The Supporting Evidence: Y-linked traits follow a clear paternal lineage.
Down syndrome, which arises from a chromosome defect, is likely to have a direct link with the increase in stress levels seen in couples during the time of conception, say Surekha Ramachandran, founder of Down Syndrome Federation of India, who has been studying about the same ever since her daughter was diagnosed with ...
A recent study suggests that a 20-year-old father doubles the chance of Down syndrome as compared to one who's 40.
The American College of Obstetricians and Gynecologists (ACOG), for example, recommends delivery between 34 and 37 weeks for twins with a shared placenta and at 38 weeks for twins with separate placentas. Some other physician groups recommend delivery closer to 39 weeks with separate placentas.
By definition, twins of a monochorionic pregnancy are of the same gender and share a single placenta (see Figs. 160.1 and 160.2). The intertwin membrane of monochorionic diamniotic pregnancies is composed of only two layers and appears thinner than the dividing membrane of dichorionic pregnancies.
First of all, you get bigger, faster. Ordinarily, at 4-5 months the belly of a mother pregnant with twins, is around the size of a the belly of a woman pregnant with one at 8-9 months.
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.