Uterine Cavity Adhesion – A Roadblock on the Way to Pregnancy Preparation
Uterine adhesion is a common gynaecological disease that seriously affects a woman’s fertility. The endometrium is the ‘soil’ where the fertilised egg takes root, the embryo is formed after the fertilisation of the sperm and the egg, and at the same time, the endometrium is actively preparing for the arrival of the embryo; when the development of the embryo and the endometrium are in the same pace, the blastocysts and the endometrium in a receptive state will be in further intimate contact, and the blastocysts will eventually burrow into the endometrial layer, and the embryo trophoblasts and the endometrial layer establish a close connection and begin to take root. The trophoblast layer of the embryo establishes a close relationship with the endometrium and begins to take root, which is embryo implantation. Once the uterine cavity adhesion occurs, the missing endometrium will affect the fertilised egg to settle in the uterine cavity, leading to infertility; in addition, the lack of blood supply and hormonal support of the endometrium will not be able to provide sufficient nutrients for the embryo, leading to repeated failure of implantation of the embryo, embryonic arrest, miscarriage and other undesirable pregnancy outcomes. I. What is Uterine Adhesion? Uterine adhesion is a secondary endometrial disease in which multiple factors cause damage to the basal layer of the endometrium and fibrotic repair predominantly occurs. During the endometrial repair process, fibro-muscular adhesion bands are formed between the inner walls of the uterine cavity, which can lead to a smaller volume of the uterine cavity, abnormal uterine cavity morphology, and in severe cases, can lead to the closure of the uterine cavity. Histologically, adhesion of the uterine cavity shows the absence of normal endometrium, endometrial fibrosis, glands are covered by columnar epithelial cells without secretion function, some interstitium may be calcified or ossified, the glands…