The greatest period of risk for birth defects due to teratogens is during the __________ period.

Question

Quizplus · Accepted Answer

The embryonic period is when the major organs and body systems develop and are therefore most vulnerable to teratogens. This period lasts from the 3rd to the 8th week of pregnancy. The germinal period (first 2 weeks) and the fetal period (after 8 weeks) are less susceptible to teratogenic effects. The neonatal period (first month after birth) is a separate stage of development and is not directly related to the risk of birth defects due to teratogens during pregnancy.

The Greatest Period of Risk for Birth Defects Due to Teratogens