"Fentanyl administered to pregnant women during labor may be passed on to their babies and show up in neonatal urine samples, researchers reported in the Journal of Applied Laboratory Medicine on March 24. Labs should be aware of this mode of transmission when screening for opioid abuse, they advised."

It should not be forgotten that the fetus, for the mother is the most important thing, and whatever harms him must be excluded from the life of the mother. I have really heard that these things damage the excretory system and that they can form other abnormalities for his life. Moreover, both lives can be damaged, which will also make the mother sterile for the future. I remember the coaches talking about this issue since I was a kid. (those who have done Performance Sports will understand me) but in order for you to be sure of the information received, you can try yourself to make a reserch, check over here