Reproduction, growth, and development of rats during chronic exposure to multiple field strengths of 60-Hz electric fields.

A study with multiple exposure groups and large group sizes was performed to establish whether exposure to 60-Hz electric fields would result in reproductive and developmental toxicity. A response model was developed from previous results and tested in groups of rats exposed to electric fields at various field strengths. Female rats were mated, and sperm-positive animals randomly distributed among four groups: sham-exposed or exposed to 10, 65, or 130 kV/m, 60-Hz vertical electric fields.

Influence of pregnancy and lactation on maternal deposition and perinatal uptake of 241Am in the rat.

To investigate the metabolism of 241Am as affected by pregnancy and lactation, female rats were injected with 5 muCi of 241Am intravenously while nulliparous, pregnant or lactating. The females and subsequent litters were killed at various times after injection to determine 241Am distribution and retention. The temporal relationship between injection and pregnancy influenced the tissue retention of 241Am in both dams and progeny.