After IVF ( in vitro fertilization , i.e., in vitro fertilization) two weeks after the so-called "replanting", the level of hCG (human chorionic gonadotropin) is measured to determine if embryo implantation has occurred, and to track whether it is developing normally. In addition, the level of hCG after IVF can be understood that pregnancy develops prolific. At the same time, the level of this hormone will be several times higher than the norm for one embryo.
When to take HCG after IVF?
The analysis of hCG after IVF varies depending on the age of the embryo, the number of days that the embryo spent in special conditions outside the body of the mother (while talking about 3-days and 5-days), from the number of days after replanting. The growth of hCG after IVF begins immediately after implantation of the embryo. Once the embryo is attached to the wall of the uterus, hCG begins to separate. Every 36-72 hours there is a doubling of its level. Optimal to wait until 14 days after replanting to ensure the effectiveness of IVF.
Results of hCG after IVF
Positive hCG after IVF can be noted already after 10-14 days after replanting. It is important to consider that implantation does not occur immediately, but in a few hours or even days after the transfer. There is a rule according to which HCG below 25 mIU / ml on day 14 after a transplant is considered non-occurrence of pregnancy. However, sometimes, when HCG is slowly growing after IVF, there are exceptions to this rule.
High HCG after IVF (that is, exceeding all norms) may be a sign of multiple pregnancies (if several embryos have been transplanted), and also talk about the risk of some embryonic developmental defects, about diabetes maternal diabetes. In very rare cases, an excessively high level of hCG speaks of a bubble drift - a malignant neoplasm in the placenta.
Low HCG after IVF may indicate that the analysis is too early, and that there was a late implantation. At any rate, the future mother should not be upset. It is necessary to retake the analysis after a few days, and also undergo an ultrasound procedure to make sure that the pregnancy has taken place.
In some cases, a low level of this hormone may indicate that the pregnancy has started, but for some reason stopped. Also, small HCG after IVF may indicate a threat of termination of pregnancy.