- the fifth wheel position on the lead trailer of a B Train must not be located more than 0.3. meters behind the center of the last axle on the lead semitrailer. Weight Limits: - the steering axle weight limit on straight trucks was increased to 7250 kg. - weight limit caps on the second trailer of A and C train double trailer combinations were. removed and replaced by the requirement that the weight of the tractor drive axles + the.
Conclusion. A single serum 2-hCG level on d 11 after embryo transfer has good predictive value for clinical pregnancy outcome in controlled ovarian stimulation cycles and helps to plan the subsequent follow-up.o assess the clinic value of a single maternal serum beta-human chorionic gonadotropin (2-hCG) assay 11 d after embryo transfer in ART pregnancies and to predict pregnancy outcome. A total of 384 pregnancies after embryo transfer were included.
Soon after implantation occurs, the embryo begins producing human chorionic gonadotropin (HGC), a key pregnancy hormone. HGC is also the hormone that pregnancy tests detect. Implantation can occur anywhere from six to 12 days after ovulation, with it taking an average of about 10 days. However, it can take a couple of days after implantation for the body to produce sufficient levels of HGC for pregnancy tests to measure. Itâs generally recommended that women begin testing for pregnancy approximately 10 to 12 days after ovulation.