Word: placentas
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...seeking ways to attack the decision. Last June they found an opportunity. Three Boston City Hospital researchers - Drs. Agneta Philipson, L.D. Sabath and David Charles - described in the New England Journal of Medicine their experiments to determine how effectively two antibiotics designed to treat congenital syphilis passed through the placenta from mother to fetus. To get their results, they had administered the drugs to women who had come to the hospital for abortions and then measured the levels of the medicines in the aborted fetuses...
...child of a positive-negative couple is usually unaffected. But if the baby is Rh-positive, and the chances are 3 in 5 that he will be, then there is an increasing chance of trouble in later pregnancies. Exposure to Rh-positive fetal blood, which may leak across the placenta or enter the maternal blood stream as a result of hemorrhage during delivery, can cause the Rh-negative mother to become sensitized, or "immunized," against future Rh-positive babies and produce antibodies that attack and destroy the babies' red blood cells...
...they would not have accorded such protection to fetuses that had been aborted. The proposed rules spelled out conditions under which experiments - including the temporary maintenance of life by means of an artificial placenta - could be conducted on them. Some research physicians feel that such experiments could give them valuable in formation on the causes of miscarriage as well as the effects on the fetus of drugs taken by pregnant women. Others believe that the opportunity to study live fetal tissue, which grows rapidly, might help them to understand better the uncontrolled multiplication of cancer cells...
Amniocentesis is, very simply, the removal of a little fluid from the amniotic sac which surrounds the developing child. This fluid, called amniotic fluid, contains cells derived from the baby's respiratory and urinary tract. A needle is injected through the placenta and a very small amount of fluid is withdrawn. This procedure can be done in the early weeks of pregnancy. However, because of possible danger to the baby, only a very small amount of liquid can be withdrawn. The few cells obtained earlier than the 16th week must be cultured from four to eight weeks in order...
Folkman pointed out that the only tissues other than solid tumors in which he has found TAF are the placenta and the fetus...