The critical period of vulnerability is a period of time during which an embryo or fetus is vulnerable to the effects of

Question

Quizplus · Accepted Answer

The critical period of vulnerability is when the fetus is most susceptible to the harmful effects of teratogens, which are substances or environmental factors that can cause birth defects or other health problems. Examples of teratogens include alcohol, certain medications, and environmental pollutants. Pregnancy complications and maternal illness can also have negative effects on fetal development, but they are not limited to a specific critical period of vulnerability. Estrogen and bacteria may impact fetal development, but they are not typically considered teratogens that have a critical period of vulnerability.

The Critical Period of Vulnerability Is a Period of Time