Twin pregnancy of the same age and sex rules out ?
Superfetation
Maternal twins
Superfecundation
None of the above
Superfetation It is the simultaneous occurrence of more than one stage of developing offspring in the same animal. In mammals, it manifests as the formation of an embryo from a different estrous cycle while another embryo or fetus is already present in the uterus. Ref : Dutta book of obstetrics 8th Ed
All India exam