Here are some reasons why: 1  Newborns make more bilirubin than adults do since they have more turnover of red blood cells. 2  A newborn baby's still-developing liver might not be able to remove enough bilirubin from the blood. 3  A baby's intestines absorb bilirubin that would normally leave the body in the stool (poop).
Marijuana Use During Pregnancy Affects Babies' Brain Development (STUDY) Using marijuana during pregnancy could affect a baby's brain development by interfering with how brain cells are wired, a new study in mice and human tissue suggests.
What are the Effects of Marijuana on a Fetus? Marijuana has many effects on the developing fetus. First, carbon monoxide in the motherâs blood travels across the placenta, lowering the amount of oxygen in the babyâs blood. This results in low birth weight. Marijuana can also damage the developing fetusâ brain, lungs and kidneys.