Because the c-type endometrium refers to the endometrium thickness of 10 to 14 mm, the most suitable for the fertilization of the egg to bed, and is homogeneous strong echoes, no intrauterine centerline echoes.
Type c endometrium is the result of ultrasound examination, ultrasound according to the uterine cavity endometrium morphology and thickness, were described as a-type endometrium, b-type endometrium and c-type endometrium, a-type endometrium is just after menstruation is relatively thin, not easy to bed.
Type b endometrium is the endometrium around the time of ovulation, and type c endometrium is just after ovulation, the thickness of the endometrium is the most suitable for fertilization, and the endometrium is more homogeneous, there is no centerline echo in the uterine cavity, and the success rate of transplantation is relatively high.
If the endometrium is too thick than 15 mm or too thin before transplantation, it will affect the fertilization of the egg and lead to transplantation failure.