There is a possibility of oxidization of the blackened scum of the Xenopus, which belongs to a kind of progestin, the main component of which is progesterone, reduces the sensitivity of oxytocin and inhibits uterine contractions. After IVF transplantation, you can use local vaginal medication, through the absorption of the vaginal mucosa, which is conducive to the implantation of the gestational sac, embryonic development, and play an auxiliary therapeutic role to improve the success rate of IVF transplantation. After normal medication, the color of vaginal effluent, is light red and brown, in the just implanted in the uterus, there is a certain damage to the endometrium, appear to have a small amount of bleeding. After plugging the drug, there is black residue, no bleeding, the possibility of oxidation is greater, as long as the body does not appear uncomfortable, the embryo is well developed, then there is no relationship.