Medical assistance can significantly affect outcomes. Fertility treatments such as in vitro fertilization and ovulation-stimulating medications frequently result in multiple births. Even common supplements like folic acid, essential for pregnancy health, have been associated with a small rise in twin conception.

Despite these factors, there is no guaranteed way to conceive twins. Genetics, timing, and biology remain decisive. Multiple pregnancies also require extra care, including proper nutrition and more frequent checkups. For couples dreaming of twins, healthy habits may help improve the odds—but the most important goal is always a safe, healthy pregnancy, whether welcoming one baby or two.