If a woman is having twins, (see details)?
494213
With identical twins - the other twin will always be female, as they are a clone of the original female.\nWith the fraternal twin - the other will be either female or male 50/50.
360456
awww.......zats a tricky question.....i wud like ta help them both....but if i had to make a choice...i wud ofcourse help the baby..coz it has got a life to look forward n the lady's already lived it up...so i guess she's gotcha take her chances!
943595
The statements \n "At least one of the woman’s children is a boy, and the man’s older child is a boy"    are equivalent from the statistical\nperspective. The probability of the other child being a boy in each\ncase is 50%.
674583
probably pregnant with another mans baby
515757
identical twins result when the fertilised egg splits into two, and one of them splits again to form triplets.\n\nNon-identical twins/triplets result from more than one eggs being fertilised
1141540
None I want to wait a while before I have any.Congradulations on your child any way,how old they!?But I want either 2 identical twin boys or just 1 boy or 1 girl thats it!
511800
If you seem to be bigger than you expect from your dates. A lot of women get worse morning sickness when they are pregnant with twins as well. But the only way to know for sure is to have an ultrasound, where they would be able to identify two babies.
616378
It depends on the circumstances - If the mother's life is in jeopardy then yes, they may suggest an abortion or if the fetus has some sort of disease (severe retardation) could be another instance
1185677
not unless they have 2 uterus's
702400
Multiple births come from two sources.  First, sometimes more than one egg is released in a single cycle.  If multiple eggs are fertilized, fraternal twins (or triplets or whatever) result.  That's why you get so many multiple births with fertility drugs--they often force many eggs to be released at once to improve the odds, or implant multiple fertilized eggs in the hope that at least one will live.\n\nIdentical twins and triplets are grown from a single egg and a very energetic sperm, which strikes the egg so hard that it tears apart into two or three fragments, each of which becomes a baby.  These babies all came from the same egg/sperm combo so they have the same genetic information.  That's also why you don't see identical siblings more than triplets.  There's only so many pieces you can tear an egg into with one impact.\n\nIncidentally, conjoined twins also come from a sperm tearing the egg apart.  If it doesn't quite separate, the pieces of the egg will form into two babies who are attached where the egg didn't tear.
586684
It could be Mary - you never specify in the problem that she only has 4 kids.  She could have two dozen :)
633332
Yes identical twins do have the same DNA. They came from the same egg so they have identical DNA.\n\nIdentical twins\nIdentical twins occur when a single egg is fertilized to form one zygote (monozygotic) which then divides into two separate embryos. The two embryos develop into fetuses sharing the same womb. Depending on the stage at which the zygote divides, identical twins may share the same amnion (in which case they are known as monoamniotic) or not (diamniotic). Diamniotic identical twins may share the same placenta (known as monochorionic) or not (dichorionic). All monoamniotic twins are monochorionic. Also note that any monochorionic or monoamniotic twins are identical twins. This condition does not occur in fraternal twins.\n\nThe later in pregnancy that twinning occurs, the more structures will be shared. Zygotes that twin at the earliest stages will be diamniotic and dichorionic ("di-di"). Twinning between 4 to 8 days after fertilization typically results in monochorionic-diamniotic ("mono-di") twins. Twinning between 8 to 12 days after fertilization will usually result in monochorionic-monoamniotic ("mono-mono") twins. Twinning after 12 days post-fertilization will typically result in conjoined twins.\n\nIn placental species, twins sharing the same amnion (or the same amnion and placenta/chorion) can cause complications in pregnancy. For example, the umbilical cords of monoamniotic twins can become entangled, reducing or interrupting the blood supply to the developing fetus. About 50% of mono-mono twins die from umbilical cord entanglement. Monochorionic twins, sharing one placenta, usually also share the placental blood supply. These twins may develop such that blood passes disproportionately from one twin to the other through connecting blood vessels within their shared placenta, leading to twin-to-twin transfusion syndrome.\n\nMonozygotic twins are genetically identical (unless there has been a mutation in development) and they are the same gender. (On extremely rare occasions, an original XXY zygote may form monozygotic boy/girl twins by dropping the Y chromosome for one twin and the extra X chromosome for the other.) Monozygotic twins generally look alike. Fine physical details such as fingerprints will differ. As they mature, identical twins often become less alike because of lifestyle choices or external influences.\n\nThe likelihood of a single fertilisation resulting in identical twins is not a hereditary trait.[citation needed] The exact cause for the splitting of a zygote or embryo is unknown.\n\nHuman identical twins can behave as differently as any other siblings (a matter of much interest to psychologists). They develop their own individual personalities, enabling them to be identified as individual persons. Many identical twins spend most of their time together (especially as children), so people often assume that they will behave alike just as they look alike; however, this is not the case. Twins are unique individuals that establish their own individual likes and dislikes. There are usually obvious signs of differences when the identical twins are observed separately or together.\n\nIdentical twins have identical DNA but differing environmental influences throughout their lives affect which genes are switched on or off. This is called epigenetic modification. A study of 80 pairs of human twins ranging in age from 3 to 74 showed that the youngest twins have relatively few epigenetic differences. The number of differences between identical twins increases with age. 50-year-old twins had over three times the epigenetic difference of 3-year-old twins. Twins who had spent their lives apart (such as those adopted by two different sets of parents at birth) had the greatest difference. (Fraga, et al., 2005).\n\nSome monozygotic twins are known as "mirror twins" or mirror image twins. These are identical twins with opposite features, that is, one may be right-handed a
774709
Hi! I'm the mother of identical twins.  There's alot of misinformation out there.  Here's a few facts:\n\n1. Identical twins are from the same fertilized egg that splits so identical twins have identical DNA.  However, this does not mean that they will look exactly alike.  I can tell my identical twins apart easily and even strangers can look closely and notice subtle differences.\n\n2. Fraternal twins are from two seperate eggs that are fertilized at the same time.  They are basically just brothers/sisters who happen to be born at the same time.  You would expect them to look as similiar (or disimiliar) as siblings born years apart.\n\n3. Really, there's no reason why you should hesitate to ask them if they are fraternal or identical.  They'll probably appreciate that you actually know that there are different types of twins and that you didn't assume they were a certain type.\n\nHope this helps!
112493
Predisposing factors\nThe cause of monozygotic twinning is unknown. Fewer than 20 families have been described with an inherited tendency towards monozygotic twinning (people in these families have nearly a 50% chance of delivering monozygotic twins). Some evidence suggests that the environment of the womb causes the zygote to split in most cases.\n\nDizygotic twin pregnancies are slightly more likely when the following factors are present in the woman:\n\nShe is of African descent \nBetween the age of 30 and 40 years \nGreater than average height and weight \nConception is soon after the cessation of oral contraceptives \nSeveral previous pregnancies. \nWomen undergoing certain fertility treatments may have a greater chance of multiple births. This can vary depending on what types of fertility treatments are used. With in vitro fertilisation (IVF), this is primarily due to the insertion of multiple embryos into the uterus. Some other treatments such as the drug Clomid can stimulate a woman to release multiple eggs, allowing the possibility of multiples. Many fertility treatments have no effect on the likelihood of multiple births.
488041
No, fraternal twins have DNA that is as similar as brother and sister would be.  That's essential what they are, brother and sister (or sisters, or brothers), but simply born at the same time, since it is two separate eggs being fertilized by two separate sperm.
117313
chimera - thats what people are called when they have 2 sets of DNA.  This occurs when one twin attempts to absorb the other in utero.\nthis will result in 2 sets of DNA.  Such as your hair may carry one set of DNA and your liver another.  I have seen this on TLC.  It showed a woman who was facing custody battles because her paternity tests were showing that her children werent hers - but they were, the DNA from the samples they took were not the DNA she passed down to her children.
172949
i would clone my girlfriend. twins, hehe