En las clínicas radiológicas existen letreros/ avisos que indican que las mujeres embarazadas o sospechan estarlo, antes de someterse a una exploración radiológica, deben consultar a su médico
¿Por que deben hacerlo?

According to the warning signs that exist in radiology clinics, a pregnant woman should consult her physician before undergoing an x-ray study because x-rays are a form of ionizing radiation that can affect the development of a gestational baby.

Explanation:

Signs/notices in radiology clinics indicate that women who are pregnant or suspect they may be pregnant should consult their doctor before undergoing a radiological examination. Why should they do it?

X-rays are a type of electromagnetic radiation -ionizing- capable of passing through the body, used to obtain images of the interior of an organism by capturing these rays on photographic film.

It is well known that X-ray radiation can have mutagenic effects on living organisms, according to the amount of radiation and the time to which it has been exposed. In the pregnant woman, who has a fetus developing inside her, special attention must be taken due to the harmful effects that ionizing radiation can have on its development. This is the main reason why a pregnant woman should consult her doctor before undergoing a radiological study.

Learn more:

X-Rays mutagenic agent

you didn't give any options but heres what i can tell you: an inference is likely to change based on additional observations. the latter is something that you have seen or sensed using your sensory organs while the former is like a conclusion out from what you have observed.