She asked me to do a KB test to check for fetal cells in
the maternal circulation.
Transfer of levonorgestrel (LNG) administered through different drug delivery systems from
the maternal circulation into the newborn infant's circulation via breast milk.
Putting these two sets of observations together, Vijayakrishna Gadi and Lee Nelson hypothesized that the persistence of fetal cells in
the maternal circulation might protect mothers from breast cancer in a manner similar to the protection afforded by a bone marrow transplant.
Humans have a very invasive placenta that would allow fetal hormones to pass into
maternal circulation and possibly influence mammary gland development.
«After finding the programming effect of fetal sex on subsequent lactations, our team discussed the possibility that daughters were releasing hormones into
the maternal circulation that could directly influence the mammary gland,» Bradford said.
Fetal progenitor cells traffic to the mother during pregnancy and can persist in
the maternal circulation for many years.