- 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.
The reliable indication. As the embryo grows rapidly, HCG levels normally double every 2 to 3 days. Thus, one reliable sign of a healthy pregnancy is the fact that the HCG levels are increasing rapidly, and often doctors may need to do 2 HCG levels 3 days apart in order to determine the viability of the pregnancy.uring the very early pregnancy, HCG levels are the only way of monitoring the pregnancy. HCG levels which do not increase as rapidly as they should may mean that there is a problem with the pregnancy-the embryo may miscarry because it is unhealthy; or the pregnancy could be an ectopic pregnancy.