Tubal Reversal Blog November, 2007

Tubal Ligation by Falope Ring and Hulka Clip

The Falope ring and Hulka clip are occlusive methods of tubal ligation. They block the fallopian tubes, but no tubal segments are clamped, removed, or burned. The Falope ring is also referred to as the tubal ring or tubal band. It constricts a segment of the fallopian tube very tightly, like an extra strong rubber band.

The Hulka clip is a miniature clamp placed across a very small (2-3 mm) segment of the fallopian tube. Another clip method besides the Hulka clip is the Filshie clip. The clips are similar except that the Hulka clip is made out of silastic and the Filshie clip is made out of metal. Occlusive methods of tubal ligation are predictably the best in terms of reversal since they damage such a tiny segment of the fallopian tube.

In contrast to the Pomeroy method, these occlusive devices are applied through a laparoscope. (Laparoscopy involves making a small incision below the belly button.) Many doctors prefer to apply tubal rings or clips when performing a tubal ligation on young women in recognition of the greater likelihood that a tubal reversal may be wanted in the future. Studies have shown that tubal ligation regret and the desire for tubal ligation reversal is more common when a tubal sterilization is performed among women in the twenties than among older women.

Tubal Clip and Ring Reversal Success

Each year Chapel Hill Tubal Reversal Center publishes current statistics about pregnancy rates and pregnancy outcomes among all of the women who have had tubal reversal procedures performed by Dr. Berger. The data for women who had tubal rings or clips shown in the table below is from our Tubal Reversal Pregnancy Study Report 2007.

Pregnancy Rates of Our Tubal Reversal Patients

The overall pregnancy rate after tubal reversal for women with clips or rings is 76% for patients at Chapel Hill Tubal Reversal Center. In the table below, the first column shows ages groups. The second column shows the number of women in each age group who had a tubal reversal. The third column shows the number of women in that group who became pregnant and the last column shows the percentage of women who became pregnant (the pregnancy rate) after their reversal procedures.

Pregnancy Rates After Tubal Reversal of Clips/Rings

Highest Pregnancy Rates After Tubal Reversal

The highest tubal reversal pregnancy rates are seen among women who have reversal of tubal clips or tubal rings. For women in their twenties, the pregnancy rate was 87%. The pregnancy rate ranged from 83% to 73% for women in their thirties. Among women age 40 or older, the pregnancy rate was significantly lower (47%), reflecting the decline in natural fertility with age. These pregnancy rates among our tubal reversal patients are similar to the pregnancy rates for women who have never had a tubal ligation to begin with.

Pomeroy Technique of Tubal Ligation and Resection

The most common type of tubal ligation is the Pomeroy procedure, named after Dr. Ralph Pomeroy who described it in 1930. The Pomeroy method involves picking up a segment of the fallopian tube to create a knuckle, placing a tie or ligature with absorbable suture around its base, and then cutting off the knuckle of tube above the tie. As the suture dissolves, the 2 remaining tubal segments separate from each other.

“Modified” Pomeroy Techniques

Interestingly, Dr. Pomeroy did not publish his technique in the medical literature but simply demonstrated it to other doctors. Some of them subsequently published the technique, but with modifications.

Currently, many doctors use the term modified Pomeroy procedure when they describe the tubal ligation they have performed in a patient’s operative report. Each doctor seems to have his or her own way of operating and there are many variations from the original method. Some doctors use absorbable suture, while others use permanent sutures that do not dissolve. Some doctors place more than one tie around the tube and many doctors also burn or cauterize the tubal ends.

A tubal ligation operative report is useful as a guide but does not predict exactly what the remaining tubal segments will be at the time of a reversal procedure. Fortunately, Pomeroy tubal ligation and its modifications are usually excellent in terms of reversibility.

Pomeroy Tubal Ligation Reversal Success

At Chapel Hill Tubal Reversal Center, we keep a record of all patients’ tubal reversal operations, including the tubal ligation method, the remaining tubal segment lengths, and other important findings at the time of surgery. Since we maintain long term follow-up with our patients, we are able to provide accurate statistics about pregnancies and their outcomes after tubal reversal surgery. Here are some of the pregnancy statistics for women who have had a Pomeroy type of tubal ligation.

Pregnancy Rates of Our Tubal Reversal Patients

The overall pregnancy rate after Pomeroy tubal ligation reversal is 70% for patients at Chapel Hill Tubal Reversal Center. The table below shows pregnancy rates according to women’s ages at the time of tubal reversal. The first column shows ages by 5 year groupings. The second column shows the number of women in each age group who had a tubal reversal. The third and fourth columns show the number and the percentage of women who became pregnant after their reversal procedure. The data shown in this table come from our Tubal Reversal Pregnancy Study Report 2007.

Here is how the pregnancy rate is calculated: The number of pregnant women (column 3) divided by all women in that age category who had reversal surgery (column 2) times 100 equals the percentage of women who became pregnant (column 4). A doctor has to know all of this information in order to be able to state what the success rate is for his patients.

Pregnancy Rate By Age After Pomeroy Tubal Reversal

Good News About Pomeroy Reversal

The good news is that for women under age 40, two-thirds to four-fifths will become pregnant following a tubal reversal procedure. Even for women age 40 and over, approximately 4 out of 10 will conceive another pregnancy. From the follow-up data that we have for our tubal reversal patients, there is good reason for optimism when reversing a Pomeroy tubal ligation.