Twins can occur either when two separate eggs become fertilized in the womb or when a single fertilized egg splits into two embryos. Having twins is more common now than it was in the past. According to the Centers for Disease Control and Prevention (CDC) , twin births have nearly doubled over the last 40 years.
What are the causes of twin pregnancy?
Multiple pregnancy usually happens when more than one egg is fertilized by a man’s sperm. But it also can happen when one egg is fertilized and then splits into two or more embryos that grow into two or more babies. Twins are called identical when one fertilized egg splits into two.
Which parent carries the gene for twins?
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.
What are the chances of getting pregnant with twins?
It is estimated that 1 in 250 natural pregnancies will naturally result in twins. While twin pregnancies can happen by chance, there are some factors that may increase your odds of having two babies at the same time.
How do twins happen naturally?
To form identical or monozygotic twins, one fertilised egg (ovum) splits and develops into two babies with exactly the same genetic information. To form fraternal or dizygotic twins, two eggs (ova) are fertilised by two sperm and produce two genetically unique children.
How do I know if I will have twins?
Ultrasound. Although the factors above may be signs of a twin pregnancy, the only sure way to know you’re pregnant with more than one baby is through an ultrasound. Some doctors schedule an early ultrasound, around 6 to 10 weeks, to confirm the pregnancy or check for issues.
What increases your chance of having twins?
Fertility treatments, particularly IVF and ovary stimulants, do increase the chances of having twins. However, a twin pregnancy is riskier for both the woman and the developing fetuses. For this reason, some fertility clinics advise against implanting multiple embryos during IVF treatment.
Can I have twins if it doesn’t run in the family?
Remember, monozygotic (identical) twins don’t run in families—they are random. You may not know if your great-granduncles were identical or not and often there is no way to know for sure without DNA testing. That being said, twins that share a close physical resemblance are more likely to be identical than fraternal.
How early can twins be detected?
“Today, twins can usually be diagnosed as early as six to seven weeks of the pregnancy,” he adds.
Do you cramp more with twins?
With a twin pregnancy, your body makes high levels of pregnancy hormones. So morning sickness may come on earlier and stronger than if you were carrying a single baby. You may also have earlier and more intense symptoms from pregnancy, like swelling, heartburn, leg cramps, bladder discomfort, and sleep problems.
Is there a pill to have twins?
Clomiphene and gonadotropins are commonly used fertility drugs that can increase your chances of having twins. Clomiphene is a medication available only through prescription. In the United States, the brand names for the drug are Clomid and Serophene.
What are the chances of having twins if your mom is a twin?
Women who are multiples themselves might carry a gene for hyperovulation (meaning that they release more than one egg during an ovulation cycle). Hyperovulation increases the ability to conceive fraternal twins. 5 The chances of twins might be as high as 1 in 17 if the mother is a fraternal twin.
How common are twins naturally?
Having twins naturally
It’s estimated that 1 in 250 pregnancies results in twins naturally, and there are two ways to conceive them.
How do I prepare for twins?
Tips on Preparing for Twins
- Pause and take 5 deep breaths.
- Be as prepared as you can by 30 weeks.
- Don’t buy two of everything.
- Talk to and get advice from other moms of multiples.
- Choose a medical support team that has experience with multiples.
- Plan to schedule everything from the moment your babies come home.