Between 1957 and 1961 many pregnant women took thalidomide to alleviate morning sickness this drug disrupted what period of prenatal development?

Thalidomide primarily disrupted the period of embryonic development, particularly between the 4th and 8th weeks of pregnancy. During this critical time, the foundations for major organs and limbs are formed, leading to severe birth defects such as limb malformations and other developmental issues when the drug was taken. Its impact highlighted the importance of drug safety during pregnancy.