If you want to have a natural pregnancy, you need to look at your family heredity to have twins. If not even one of your relatives on either your side or your husband's side has ever given birth to twins, your chance of having twins is equal to zero.
如果你想自然懷孕，生孖B要睇家族遺傳㗎喎，如果你哋兩邊親戚都冇一個生過孖B，你哋生孖B嘅機會等於零。