The culprit to this theory is something called insulin-like growth factor (IGF), which is a protein that’s released by the liver that has been undoubtedly linked to twinning and being tall.
So, if you’re 5 feet 3 inches and above, your probability of having two little passengers boarding your mothership is quite high.
Family history
Family history increases your chances of giving birth to twins, but only from your mother’s side.
Therefore, even if your spouse’s father’s side is full of dynamic duos, your likelihood of conceiving double bundle of joys are null.
Your age
The older you get, the higher your chances of giving birth to twins.
According to research, women who are older have higher levels of a hormone called Follicle-stimulating hormone (FSH) , which prompts a higher probability of having twins.
These women are also more probable to produce multiple eggs in a cycle compared to younger women, hence higher chances of resulting to twin pregnancy.