Without being able to influence nature and chance, there are factors that predispose some women more than others to having twins. Thus, twinning is a matter of heredity:a woman who herself has a twin sister or a twin brother thus has nearly twice the chance of conceiving twins in turn. The age of the mother is also to be taken into account during pregnancy:the younger the woman (under 35), the more likely she is to have twins, because her follicles are more numerous and more reactive. Finally, the more children a woman has at the time of conception, the more likely she is to have twins!
According to some scientists, there is an unstoppable trick to increase your chances of having twins:to conceive a new child (and in this case two) while breastfeeding your previous baby. This would be explained by an overproduction of the level of the hormone FSH during breastfeeding, one of the hormones favoring the conception of false twins. But other studies are needed to support this hypothesis, which is not yet fully proven!
Some people claim that you can also increase your chances of having twins by having sex at a certain time of the year, or by avoiding the use of certain contraceptives. Some will also tell you that you have to eat a lot of dairy products or sweet potatoes… All these factors are actually very controversial. Better not trust it one hundred percent... but nothing prevents you from trying!