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。
If you want to get pregnant naturally, it depends on the family genetics, if none of your relatives have ever given birth to a double B, your chance of having a double B is equal to zero.