Tubal blockage, also known as fallopian tube obstruction, is one of the main causes of infertility in women. Generally, tubal blockage can be categorized into three states.

1. Fallopian tube is open but also adhesive . Infections are always the causes of tubal blockage, when infection occurs, fallopian tubes can be affected and salpingitis develops. Because of the irritation of inflammation, stasis or metabolin can attach on the tube wall, adhesion can occur meanwhile. Such an adhesion can occur between the tube and tissues around it as well, as a result, tubes don't function well - can't squirm normally. Adhesions outside the tube can be treated by surgeries and most sufferers can get pregnant naturally after that.

2. Fallopian tube is slightly blocked. The blockage can occur at any part of the tube, but in most cases, elsewhere except for the blocked area is normal. Cases like this is always treated by hydrotubation. If there's hydrosalpinx as well, doctors would make a small opening on the tube to expel the fluid and then sew it up. Successful rate of the treatment is nearly 90%.

3. Fallopian tube is massively obstructed adhesive with severe damage. Patients with long-term untreated tubal blockage or tubal adhesion can suffer from such a condition. Tubes in this cases are with lots of scar tissues and stiff, it can hardly squirm. Lesion like this is always unreversable. Even the tubes get opened by surgery, it's quite difficult to conceive naturally. IVF is the best choice for patients with this condition.