Parasitic or Heteropagus Twins are asymmetric conjoined identical or monozygotic twins in which the tissues of a severely defective twin (the parasite) are dependent on the cardiovascular system of the other, largely intact twin (autosite) for survival.

Q: Can I tell from my basal body temperature (BBT) if I am ovulating today?

A: You cannot determine from the BBT ahead of time whether you are about to ovulate or not. There is sometimes a drop in temperature on the day of ovulation, but whether it was really ovulation or not can only be determined after the temperature has gone up and stayed up typically for several days.