At thirteen weeks the fetus is fully formed and as long as your doctor knows you are pregnant when prescribing he/she feels thst the benefits outweigh any problems.
they are passed to the fetus and cause imbalanced compounds that effect DNA
yes.....it can
The fetus is not in the bowel, so, no. If the fetus has been borne, then still, no.
No, they are safe.
Not likely.
It may not harm the fetus but will harm YOU for sure. Say NO to 'drugs'.
They can harm fragile ecosystems
No
Absolutely YES! Substances of good/bad can be transported from what is inhale by the mother to the fetus by the process of "blood flow from the mother to the fetus" or entering the umbilical cord to the fetus .
A "bit" of marijuana will do no harm to the fetus, however habitual/daily smoking of marijuana (Or tobacco) will have adverse effects on the unborn baby.
Theoretically it is risky to the fetus if you smell the bleaching. But practically it will be taken up by body tissue and it will not harm your fetus.