To aid the self-monitoring process I think because if you have the deadline you will make it a priority to get it done befor the deadline. you are making sure your getting it done befor the deadline
The use of alcohol, tobacco and drugs can contribute to all of the following like, increased possibility of miscarriage, premature delivery, low birth weight except delayed labor. It is impossible that a mother can have delayed labor because first using this kind of drugs can give you miscarriage.
