즉, 여아로 자라는 수정란은 X염색체를 가진 정자와 난자가 만나야 하는데, X염색체가 방사능에 취약하기 때문에 핵물질이 확산된 지역에는 여아 출생률이 낮아지는 것 같다고 연구진은 추론했다.
In other words, fertilized eggs that develop into girls must come into contact with sperm and eggs that contain X chromosomes, and the researchers concluded that the birth rate of girls appears to decline in areas where nuclear substances are prevalent, as X chromosomes are particularly susceptible to radiation.