Have a family history of fraternal twins
Be older, especially in your 30s
Be of African ancestry
Have had multiple previous pregnancies
Conceive soon after stopping hormonal birth control
Have a higher body mass index
Use fertility treatments such as IVF
Use ovulation-inducing medications under medical supervision
Transfer more than one embryo during IVF, if advised by a fertility specialist
Consult a fertility specialist for personalized guidance
Avoid unproven supplements or methods marketed to increase twin chances