Yes, plain and simple. Methadone will also cause dependance and withdrawal for the baby. But it is not recommended that you stop methadone if you get pregnant and are are on it already as withdrawal symptoms on the mother can harm the fetus.
No.
vitamin a,vitamin d,usually cross placenta during pregnancy.exept vitamin c
yes
IgG is the only antibody small enough to cross he placenta.
IgG is an immunoglobluin monomer, meaning that it is one immunoglobulin that is small enough to cross the placenta. An example would be the Rh antibody that causes isoimmunization between Rh negative mothers and Rh positive fetuses. In constrast, ABO blood group immunoglobulins are IgM which is a pentamer, meaning it is composed of 5 immunoglobulins and is too large to cross the placenta.
semen does not cross into the placenta and has no effect on baby in womb.
No. Red blood cells do not cross the placenta.
Yes, methadone is an opiate blocker and will block the effects of heroine.----------------------------------ImprovementMethadone does not contain an opiate blocker at all. It has a cross-tolerance with opioids, and higher doses of methadone can reduce the high: but from first hand experience I can tell you categorically that methadone does not totally block the high you get from taking heroin.
To me it smells like a cross between stale urine and spoiled fish
This is called natural passive immunity.
babies may be born with a drug dependency
The embryo gets all the oxygen, and all the nutrients that it needs from the mother's blood supply, all of which crosses the placenta, through the umbilical cord into the embryonic blood system.