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预先对小鼠予小剂量照射，３～６ｈ后再接受大剂量Ｘ射线全身照射，观察小剂量辐射对大剂量损伤的拮抗作用。实验结果证明：预先照射０．０１Ｇｙ后，以染色体畸变为观测终点，则骨髓细胞和初级精母细胞染色体畸变均低于单纯大剂量组（ｐ＜０．０１）。雄鼠预先经０．０５ＧｙＸ射线处理６ｈ后全身照射２．０ＧｙＸ射线，在９周内的受育率明显高于单纯大剂量照射组（ｐ＜０．０１）。说明小剂量电离辐射不仅具有降低小鼠遗传物质的损伤作用，而且可以提高受大剂量照射小鼠的生育能力。
Small doses of mice were pre-irradiated, and then received high-dose X-ray irradiation 3 to 6 hours later to observe the antagonism of low-dose radiation on large doses of injury. Experimental results show that: after pre-irradiation 0.01Gy, chromosome aberration as the end point of observation, the bone marrow cells and primary spermatocytes chromosomal aberrations were lower than simple high-dose group (p <0.01). Male rats pre-0.05Gy X-ray treatment 6h after systemic irradiation with 2.0Gy X-ray, within 9 weeks of fertility was significantly higher than high-dose group (p <0.01). It shows that low-dose ionizing radiation can not only reduce the damage of genetic material in mice, but also increase the fertility of irradiated mice.