Pregnancy without germ causes

Early pregnant women, check the embryo has no embryo, this may be because of B ultrasound too early, the embryo has not formed, can be checked again after a week, the general embryo appears in the pregnancy after 45-55 days, if more than 55 days check no embryo, may also be follicle development is not good, this phenomenon embryo generally does not continue to grow and develop.