11.   But the use of fetal tissue has provoked ethical disputes, and performing brain surgery to harvest stem cells is not practical.

12.   Caplan said fetal tissue represented a tiny fraction of all tissue research but was being used to stir alarm in the anti-abortion sector.

13.   Cell lines derived from fetal tissue provide a medium for growing viruses used in vaccines.

14.   Crutcher acknowledges having hired people to work undercover to gather information about fetal tissue work at the clinic.

15.   Congress is expected to revisit the question of fetal tissue bans this coming year or face the loss of major research labs to overseas locations.

16.   Despite the medical promise, the use of fetal tissue poses grave ethical questions.

17.   Doctors never approach women to donate fetal tissue until after they have had an abortion.

18.   Fetal tissue and organs can be donated and fees charged only for reasonable facilities, staff and shipping costs.

19.   Fetal tissue research also may help patients with spinal cord inju ries, epilepsy and other neuro-de generative diseases.

20.   FDA officials say that ultrasound can generate heat in fetal tissue, create microscopic bubbles and cause vibrations, all of which might affect fetal development.