Disruptions to the development of a zygote can occur at any time during pregnancy. Among the time periods mentioned below the most vulnerable period of development for a zygote/fetus/embryo would be the
A)first week.
B)twentieth week.
C)thirtieth week.
D)fortieth week.

Question

Quizplus · Accepted Answer

The first week of pregnancy is the most vulnerable period of development for a zygote/fetus/embryo as this is the time when the fertilized egg is implanting in the uterine wall and beginning to differentiate into different cell types. Any disruptions during this time can result in miscarriage, chromosomal abnormalities or birth defects.

Disruptions to the Development of a Zygote Can Occur at Any