The is the time when serious defects from teratogens are most likely to occur because this is when the groundwork is laid for all body structures and internal organs

period of the embryo or the embryonic period. This period lasts two weeks and it is part of prenatal development. Serious defects are most likely to occur because the embryo is very sensitive to toxics/toxins that enter the body such as alcohol, drugs, radiations (even from microwaves), pollution, and many forms of viruses.

This is giving me a headache i have asked others and they don’t know it either