✔ 最佳答案
X-rays are a type of high energy radiation that can reduce cell division, damage genetic material, and produce defects in unborn children, it depends on the level of exposure
Unborn children are particularly sensitive to x-rays because their cells are rapidly dividing and developing into different types of tissue. Exposure of pregnant women to sufficient doses of x-rays could possibly result in:
1. Mmiscarriage or damage to unborn children,
2. Malformations or development of cancer later in life.
3. Growth retarded, or development of cancer later in life.
With most x-ray procedures, relatively low levels of radiation are produced. However, as a safety precaution, the use of x-rays in pregnant women should be avoided unless absolutely necessary. Women who receive x-rays before realizing they are pregnant should speak to their doctors.
The effects of x-rays on unborn children depend upon the period of pregnancy during which the x-ray was conducted. The following summarizes possible effects of x-ray exposure according to the time of pregnancy at which exposure occurred:
X ray against to the week of Pregnancy Effect
0–1 week (pre-implantation) Death of embryo
2–7 week (organ development Malformations, reduced growth, cancer
8–40 week(fetal stage) Malformations, reduced growth, cancer, mental retardation
It also found in a survey that more than 30 percent of family practitioners and 20 percent of obstetricians overestimated the risk of major malformations on a 6-week-old fetus as a result of X-ray exposure in the abdomen area.
Actually, there is no definite % shown out the risk of having the an abnormal fetus after an early exposure to Xray. The estimating one from Canada is that the risk is 1 in 2,000 or 1 in 3,000. However, many studies show that the exposure of fetus to X-ray was over-stimulated. It is why the doctor hesitate to answer your question.
參考: from my knowledge and reference from other articles