There are three specific ways to have multiples, in vitro fertilization (IVF), having a partner or a family history of multiples, and taking ovulation medication. 1. In Vitro Fertilization (IVF): Twins or multiple births can occur when two or more gestational sacs are transferred at once. 2. Partner or family history of multiple births: If you or your partner has a family history of multiple births, there is a higher probability of multiple births after natural conception, which may result in the formation of two fertilized eggs or the splitting of one fertilized egg into two gestational sacs, which is the safest way to conceive multiple births. 3. Taking ovulation drugs: Taking ovulation drugs can promote the development of two or more follicles to achieve double or even multiple egg fertilization. The healthiest method is natural conception, whether it is one or more, multiple pregnancies have more maternal and fetal complications and are high-risk pregnancies, and it is not recommended to use drugs simply to pursue multiple pregnancies.