If two or more are fertilized and both implant, you might just need two cribs in your nursery. Taller women seem to have a higher rate of having twins. This may sound a bit strange, but researchers credit a certain insulin-like growth factor with this possibility. Women who have overweight or obesity also have a higher chance of conceiving twins naturally. Specifically, the chances are highest if your body mass index BMI is above 30, according to a study that looked at data from more than 51, births in the United States.
A later study in that analyzed maternal characteristics among women in Norway said rates of twins increased among women with BMI above Having a BMI over 30 may also place you in the high-risk category of pregnancy, so talk to your doctor about a healthy weight for you before getting pregnant.
Black women deliver twins at a higher rate than white women, according to birth statistics in the United States. But Asian and Hispanic women deliver twins at a lower rate than the other groups. This may occur because women who eat dairy may be taking in extra insulin growth factor.
The cows release this hormone into their milk and — when consumed — it may influence human reproduction. And little research if any regarding dairy intake affecting twin birth rate has been completed since.
He or she may be the reason you end up having twins. A previous pregnancy — or, better yet, previous multiple pregnancies — may increase your chances of having twins. In fact, according to the , women between the ages of 35 to 40 with four or more children are three times more likely to have twins than a woman under 20 without children.
Clomiphene citrate Clomid and letrozole Femara are ovulation-stimulating medications. Both of these drugs are often given in IUI cycles and may help the body produce multiple eggs that may release at the same time.
If two or more are fertilized and implant, twins are a possibility. In one study , the rate of twins with Clomid was 7.
Femara had a lower rate of just 3. Gonadotropins, like follicle stimulating hormone FSH , stimulate the growth of egg follicles. Fraternal twins are common if a woman uses in vitro fertilization IVF.
With this type of fertility treatment, two fertilized embryos are often placed into the womb to increase the chance of pregnancy. When both embryos implant and develop successfully, twins are born. With IVF, the chance of twin pregnancies is 12 percent in women under 35 and 9 percent in women ages Women may opt for this if they are trying to conceive, but it usually doesn't increase the chances of having twins as with IVF. These may help a woman produce more than one egg at a time.
Sperm is put directly into the uterus to help it get closer to the egg. When two or more are fertilized and they implant, twins can occur. There are also gonadotropins. This is a follicle-stimulating hormone FSH , that helps the growth of egg follicles. These are often used during IUI and other fertility treatments.
This can increase the rate of twins by 30 percent. At that age, women tend to release more than one egg during their reproductive cycle than younger women. This is due to hormonal changes that start to happen near menopause. If sperm fertilizes more than one egg, you have twins. A woman's diet may also result in a higher chance of having twins.
Some research indicates that women who have no dairy in their diets and consider themselves vegan may increase their chances of having twins. This may be attributed to the growth hormones found in milk that may play a role in reproduction. There is also some belief that yams could increase a woman's chances of having twins. This study was done in Nigeria where the twinning rate is the highest in the world. The findings are based on the belief that yams have a natural hormone phytoestrogen, which may stimulate multiple ovulation, resulting in twins.
Still, several factors, such as your age and ethnicity as well as the use of fertility treatments, can increase your odds of having twins. Fraternal twins are conceived when two eggs are fertilized by different sperm cells in the same menstrual cycle. They are twice as common as identical twins, which are conceived when one egg is fertilized by one sperm cell.
The fertilized egg splits into two, forming two embryos in the uterus. Fertility treatments raise your chances of having both fraternal and identical twins, but there are several other factors, like your age, race, and family history, that can increase your probability of having twins:. Heredity: If you're a twin, or if there are twins in your family, you're slightly more likely to have a set yourself.
Age: The older you are, the higher your chances of having fraternal twins or higher order multiples. One theory is women age 35 or older produce more follicle-stimulating hormone FSH than younger women. FSH is also the hormone that causes an egg to mature in preparation for ovulation each month, and women with extra FSH may release more than one egg in a single cycle. So older women are statistically less likely to get pregnant, but they're more likely to have twins if they do.
History of twins: Once you have a set of fraternal twins, you're twice as likely to have another set in future pregnancies.
Number of pregnancies: The more pregnancies you've had, the greater your chances of having twins. Race: Twins are more common than average among white and African American people and less common among Hispanic and Asian people. Body type: Fraternal twins are more common in large and tall women than in small women. Certain treatments for infertility may increase the likelihood you'll become pregnant with twins, triplets, and higher-order multiples because they boost ovulation.
For example, gonadotropins are injectable fertility medications that stimulate your ovaries to produce multiple eggs during ovulation. If more eggs are released, that increases the likelihood that more than one egg will become fertilized, hence a multiple pregnancy.
Using assisted reproductive technology ART , such as IVF, boosts your chances of having twins, but you can prevent a multiple pregnancy by asking your doctor to transfer only one embryo at a time. These podcasts can inform, inspire, and put you in touch with the right resources. For anyone hoping to raise a child, infertility can be disruptive and heartbreaking. But having access to online communities of people who understand…. From navigating a healthy diet to your mental health, these books will help shed some light on the complex world of women's health.
Want to get to know your hormones, inside and out? Mira may be the right choice for you. Experts say many women opt for additional treatments during in vitro fertilization IVF procedures despite limited evidence on their effectiveness.
Health Conditions Discover Plan Connect. Tips on How to Conceive Twins. Share on Pinterest. As a result, twin births are more common today than ever. How to conceive twins with in vitro fertilization IVF. How to conceive twins with fertility drugs. Does family history increase your chances of having twins? Chances of having twins after Are tall or overweight women more likely to have twins?
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