The distribution of radiophosphorus (^(32)P) was observed in three groups of female Albino rat consisted of early pregnancy group (10 days of pregnancy), late pregnancy group (18 days of pregnancy) and nonpregnanted control group. The results obtained were as fellows:
1. The various sites arranged in the descending of absorption rate of ^(32)P were femur, mandible, liver, spleen, ovary, fetus (only from early pregnancy group) and kidney in both groups of non-pregnanted and early pregnancy and femur, mandible, fetus, liver, ovary, spleen and kidney in the late pregnancy group.
2. The significant difference (P<0.05) in the absorption rate twas found between femur and mandible in the early pregnancy group.
3. The absorption rate of fetus from late pregnancy group was significantly (P<0.01) higher than that of fetus from the early pregnancy group.
4. The high absorption rate was observed with femur and mandible in both groups of non-pregnanted and early pregnancy.
5. The significantly (P<0.01) high absorption rate was observed with ovary and fetus from the late pregnancy group.
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