Leading a discussion among couples who are thinking about getting pregnant, the nurse stresses that preconception counseling to identify risks and encourages modification by the couple before conception. the nurse considers the discussion successful when the couples realize that the greatest risk to the embryo is:

The greatest risk to the embryo is 17 - 56 days after conception i.e approximately 2-8 weeks after conception. It is during this stage that the human embryonic development has started and is very crucial to the growth and health of the baby. 

The main role of dna in the  cell is the long-term storage of information. it is often compared to a blueprint, since it contains the instructions to construct other components of the  cell, such as  proteins  and rna molecules.the main function of rna is to carry information of amino acid sequence from the genes to where  proteins  are assembled on  ribosomes  in the  cytoplasm. mark brainliest, my work is good.