This kind of phenomenon can appear likely, but I feel our country should possibility is less, after all foreign person is opener.
This kind of phenomenon calls the corresponding period answer pregnant, means two ovum are united in wedlock with spermatozoon respectively inside short time, next be fertilized, if spermatozoon originates same a father, actually it doesn't matter is affected, but if originate two father, that is more complex.
Normal gravid circumstance is to become after an ovum be fertilized, the mother's body is met automatic open " use contraceptive " mode, but also have extremely small possibility, below the condition that already experienced essence of life in an ovum, eduction an ovum, next again be fertilized, just may appear in every 100 pairs of twin probably a pair, and fall in the circumstance that intervenes without the outside, twin happening probability is 1/89, so everybody can be calculated this probability.
I had not seen this kind of case, can be told so only from medical angle, produce the word of this kind of thing really, be like a relation a bit complex.
(the picture results from network)
The hope can be helpful to everybody.
