I Had Identical Twins Naturally. What Are My Chances of Having Twins Again

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What boosts your odds of having twins? Fertility treatments like Clomid (clomiphene), Gonal-F (follitropin alfa), and Follistim (follitropin beta) make information technology more likely you lot'll conceive multiples. But other factors similar your height, age, and fifty-fifty family history can also increase your odds of conceiving more than than one infant in a single pregnancy.

Causes of Twins Without Treatments

Fertility treatments are not the only crusade for twins and college-order pregnancies. Here's an overview of the other factors that increase your chances of getting meaning with multiples.

Age

People over 30 are more than likely to conceive twins. This is because follicle-stimulating hormone (FSH) rises as birthing parents get older. FSH is responsible for the development of eggs in the ovaries before they are released.

Equally people age, they crave college levels of FSH because their eggs require more than stimulation to grow than before. Sometimes, the follicles overreact to higher FSH levels and 2 or more eggs are released and fertilized, resulting in a multiple pregnancy.

Family History

A family unit history of identical twins does not necessarily make you more likely to have multiples, although the offspring of male identical twins may be more likely to take their own identical twins. Nevertheless, if you have fraternal twins (not-identical) in your family unit, your chances of conceiving twins rise. If there are fraternal twins on both parents' or egg or sperm donor's sides, your odds for twins go up even higher.

A history of fraternal twins on the maternal side of the family unit indicates a higher likelihood of ovulating more than than ane egg per cycle.

Weight

People with a BMI over xxx are more probable to conceive twins than people with a lower BMI. Extra body fat leads to increased levels of estrogen, and higher levels of estrogen can lead to overstimulation of the ovaries. Instead of releasing just one egg at ovulation, the ovaries may release two or more than. While the odds of twins may increment, other factors associated with being overweight can make it more difficult to excogitate.

Summit

People who are taller than average are more likely to accept twins. I study establish that people averaging 164.viii cm in height (about v'4.eight") were more probable to conceive twins than people averaging 161.viii cm (almost 5'3.7"). Why this happens isn't articulate, but i theory is that better nutrition (which may atomic number 82 to more than meridian) is partially behind the increased charge per unit of twins.

Breastfeeding

People who conceive while breastfeeding are more probable to conceive twins than people who are not. It's true that breastfeeding can besides suppress fertility and prevent pregnancy, specifically during a baby's first six months if the baby is exclusively breastfed. However, it is possible to become significant when breastfeeding—and with twins!

One study constitute the rate of twins to be 11.4% amidst breastfeeding people as compared to just 1.1% among non-breastfeeding people.

Diet

While inquiry is still ongoing, some studies have found that people who swallow a lot of dairy products are more likely to conceive twins. Ane theory is that the growth hormones given to cows impact the hormone levels in humans.

Other Factors

Twins are more common in people who have carried many pregnancies and accept big families. Meanwhile, Blackness people besides are more likely to conceive twins than White people, while Asian people are the to the lowest degree likely to conceive twins.

Odds of Having Twins With Treatments

Fertility treatments that boost ovulation can atomic number 82 to twins, triplets, or higher-order multiples. Conceiving multiples is a potential risk of fertility treatments and one that can possibly be reduced with conscientious monitoring and targeted treatment such as single embryo transfer with IVF handling or using the lowest possible constructive dosage when treating with gonadotropins.

You may wonder why conceiving multiples is considered a "risk" and not a potential do good to fertility treatments. After all, if y'all've been struggling to become pregnant, wouldn't a double or triple blessing be a skillful affair? The fact is that multiple pregnancies come with added risks to the parent and babies.

Not all treatments for infertility increase your odds of conceiving twins, but most exercise. Here are some of the treatments that may atomic number 82 to twins.

• Clomid (clomiphene)
• Femera (letrozole)
• Gonadotropins (also known as injectables) like Gonal-F and Follistim
• IUI handling, when used forth with fertility drugs
• IVF treatment

	Overall	Clomid and Femera	Gonadotropins	IVF (under 35)	IVF (ages 35–37)	IVF (ages 38–40)
Twins	3.21%	5–12%	Upward to thirty%	12.1%	9.1%	v.three%
Triplets and Higher-Lodge Multiples	0.one%	<i%	Upward to 5%

Clomid and Femera have the lowest rate of twins, ranging from 5% to 12%. The charge per unit of triplets and higher-order multiples with these medications is under i%. Gonadotropins, whether used with or without IUI treatment, have the highest charge per unit of twins and college-order multiples.

Co-ordinate to some studies, upward to 30% of pregnancies conceived with gonadotropins pb to multiples. Most of these pregnancies are twin pregnancies, simply up to v% are triplet or college-society pregnancies.

Contrary to popular belief, IVF treatment is non the main source of triplet and higher-order pregnancies. Data collected by the CDC indicates that the rate of IVF-conceived triplets in 2014 was i.5% of pregnancies (but only 0.ix% of alive births due to pregnancy loss).

IVF twins are relatively common, with the twin rate highest for people younger than 35 at 12.one% per transfer in 2014. The IVF twin rate is lower for people over age 35 at 9.1% for people aged 35 to 37 and five.3% for people ages 38 to xl, likely due to the overall decreased success rate equally the gestational parent ages.

How Common Are Twins?

Co-ordinate to CDC birth statistics, in that location were 120,291 infants born in twin deliveries in the Us in 2019. That'due south 32.1 twins per 1,000 alive births, or put some other way, about three.21% of live births. There were 3,136 triplet births and but 150 quadruplet and college-order births during the same year. These numbers include naturally occurring multiples, along with those conceived with fertility treatment.

The rate of multiple births increased and peaked during the 1990s but has been declining over the by decade. The percentage of triplet and higher social club pregnancies has dropped 36% since 2004.

Chances of Having Identical Twins

In the general population, identical twin pregnancies occur 0.45% of the time, or 1 in 250 births. While most multiple pregnancies conceived with fertility treatments are fraternal twins, the utilise of fertility treatment also increases your take a chance of having identical twins.

Co-ordinate to 1 study, identical twins made up 0.95% of the pregnancies conceived with treatment. That'south double the general population'southward gamble. It'due south unclear why fertility treatment leads to more identical twins.

One theory is that the civilisation embryos are placed in during IVF increases the risk of identical twinning. Another theory is that treatments using gonadotropins lead to the increased hazard of identical twins.

Odds of Higher-Social club Multiples

Anyone trying to conceive will find their chances of having college-order multiples much lower than twins or singleton births. Without fertility treatments, the odds of conceiving triplets spontaneously is around 1 in 1,800. For quadruplets, the odds are estimated to be effectually ane in 729,000.

With fertility treatments, the chances of a higher-order pregnancy rise substantially. In 2019, for example, the charge per unit for triplet and higher-guild multiples was 87.vii per 100,000 births (0.877 per 1,000 births). Estimates are that just over three-quarters of triplets and higher-society multiples are the result of fertility treatments.

A Word From Verywell

Your chances of having twins will depend not just on whether you undergo fertility treatment to conceive but likewise on your family history, race, age, and many other factors. These factors are also cumulative. In other words, a tall person with a family history of fraternal twins is more likely to excogitate twins during fertility treatments than a short person without whatever family unit history of twins.

The twin and multiple rates also vary from fertility clinic to clinic. Twin rates differ based on how advisedly they track ovulation stimulation during fertility drug use and how many embryos they routinely transfer during IVF.

While having twins may audio like the kind of two-for-i deal any couple would honey to have afterwards experiencing infertility, information technology really is all-time to aim for one healthy infant. Your doc can reduce the odds of multiples with careful monitoring and single-embryo transfer during IVF.

Nonetheless, if you do excogitate twins or more, know that good prenatal care can reduce your adventure of complications. At that place are likewise many positive benefits to having twins.

Often Asked Questions

• What are the chances of having twins if they run in your family?

  A family history of identical twins will not necessarily increase your chances of having them yourself, although the offspring of male identical twins are more than probable to have them. However, you are more likely to have twins if in that location are fraternal twins in your family. If there are fraternal twins on both your mother's and male parent'due south sides of the family unit, your chances of having fraternal twins yourself are fifty-fifty college.

• How can I increment my hazard of having twins?

  Many of the factors that increment your odds of having twins are out of your command, like your family history and pinnacle, for case. Merely there are other ways to ameliorate your odds if y'all're hoping for multiples. Factors that increment the chance of twins include: consuming loftier amounts of dairy foods, beingness over the historic period of thirty, and conceiving while breastfeeding. Many fertility drugs including Clomid, Gonal-F, and Follistim also increment the odds of a twin pregnancy.

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Source: https://www.verywellfamily.com/what-are-my-chances-of-having-twins-1960180