Value chain · CLM-1300
Low confidence
The evidence behind this statement is thin, indirect or second-hand. Read it as a lead to check, not as a settled finding.
In plain terms
Pregnant rats kept almost all day in a microwave field at a fence-line level (5 W/m2, about a fiftieth of the 1978 beam centre) had more pups die in the first week and pups that developed a day late. The authors called for replication.
The claim as recorded
In a rat study at 500 uW/cm2 (5 W/m2), 2450 MHz, 20 h/day for the first 19 days of gestation (8 exposed, 8 sham, 8 non-handled dams), the exposed litters had seven neonatal deaths in the first week against one in each control group. Exposed pups had lower body weight on day 7 and a 24-hour delay in eye opening (p < 0.015). At birth there were no physical abnormalities and no difference in birth weight or litter size. Prenatally exposed females later grew faster and kept about a 10 per cent higher adult body weight, and prenatally exposed males fostered to naive mothers held core temperature less well under 5 deg C cold stress.
Evidence behind this: T3-an unpublished, unattributed typescript as held; one experiment, eight litters per group.
Scope and limits
ANIMAL DATA AT ONE DENSITY IN ONE STRAIN; NO HUMAN INFERENCE IS DRAWN BY THE PAPER OR HERE. Eight dams per group; no dosimetry (SAR) is given in this document, though the companion abstract gives 0.416 W/kg for the dams (CLM-1301 (low confidence)). The weight-gain difference during gestation is reported at p < 0.1 (PDF p.6). Authors redacted; no year or venue; peer review unknown; no independent replication held. The paper says its effects are "opposite" to an earlier 918 MHz, 5 mW/cm2 study (PDF p.2, paraphrase). 500 uW/cm2 = 0.5 mW/cm2 = 5 W/m2, 46 times below 230 W/m2 (my arithmetic).
What it assumes
No assumptions are recorded against this claim.
Where it comes from
PDF p.1: exposure "for twenty hours a day throughout the" first nineteen days of gestation; "There were seven times as many neonatal deaths in the exposed litters" than in the controls. PDF p.7: seven exposed pups died against one in each control group (paraphrase); "24-hour delay in the onset of this major developmental milestone" (eye opening, p < 0.015); day-7 weights lower for females (p < 0.01) and males (p < 0.05) (paraphrase). PDF p.6: no abnormalities or birth-weight differences at birth (paraphrase). PDF p.8: "Replication studies are now being planned".
Basis: uW/cm2 incident; hours per day; days of gestation; litters
Related records
- Answers question
- QST-023 not published in this release
Cite this
energyaperture.com/c/clm-1300
CLM-1300, Energy Aperture, as of unknown (1978 or later; not printed).