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How to Increase the Chance of Having Twins

How to Increase the Chance of Having Twins


Are you wondering how to increase the chance of having twins? Current statistics indicate that approximately only one out of every 41 births is a twin birth, and luck is always a factor when it comes to conception, but there are some things that do increase your odds of having twins.


Unfortunately, there’s nothing you can do to change your genes, but a family history of twins on the mother-to-be’s side of the family does increase the odds of a couple conceiving twins.

Maternal Age

Women over the age of 30 have an increased chance of conceiving twins. Higher levels of follicle-stimulating hormone (FSH) in older women make it more likely they will release more than one egg during ovulation, increasing the odds of fraternal twins.

Fertility Treatments

Fertility treatments geared toward stimulating ovulation also increase the odds of conceiving fraternal twins due to the higher likelihood of more than one egg being released during ovulation. While the average woman has less than a three percent chance of having twins, women taking oral fertility treatments have a 10 percent chance of conceiving twins, while women taking injectable fertility treatments have a 15 to 20 percent chance of conceiving twins.

In Vitro Fertilization

If you are forced to undergo in vitro fertilization, you can request that multiple embryos be implanted. This is no guarantee of twins, however, because not all implantations are successful.


A study carried out by Gary Steinman at the Long Island Jewish Medical Center in New Hyde Park, New York and published in the Journal of Reproductive Medicine suggests that consuming dairy can increase a woman’s chances of having twins. Steinman came to this conclusion by comparing birth records of vegan women to non-vegan women. He found that both omnivorous women and vegetarian women were five times more likely to conceive twins than vegan women. He ascribed the increased odds of having twins to the ability of certain animal products, particularly dairy, to stimulate the production of insulin-like growth factor (IGF) in women. He theorizes that IGF stimulates ovulation, again increasing the chances that a woman will release two eggs during ovulation, boosting the odds of fraternal twins.



“ACOG Education Pamphlet AP092 — Having Twins.” American Congress of Obstetricians and Gynecologists. N.p., n.d. Web. 15 Mar. 2010.

“Pregnancy after 35: Healthy moms, healthy babies –” Mayo Clinic medical information and tools for healthy living – N.p., n.d. Web. 15 Mar. 2010.

“Study finds that a woman’s chances of having twins affected by diet.” Doctor’s Lounge. N.p., 26 May 2006. Web. 15 Mar. 2010.

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