Aspect 1: Background and principle of ligation
Ligation is a common sterilization operation. By blocking the oviduct or vas deferens of female or male reproductive tract, it can not transfer eggs or sperm to achieve the purpose of contraception or sterilization. Female ligation is also called tubal ligation, and male ligation is also called vas deferens ligation.
The tubal ligation is usually performed by laparoscopy or laparotomy, and the tubal ligation or excision is performed. Vasectomy is performed through small incision or pinhole fluoroscopy to ligate or seal the vas deferens. Ligation is a reversible method, but the success rate of recovery of pregnancy capacity is low.
After the ligation operation, the female fallopian tube or male vas deferens are broken, sperm and eggs cannot meet, and the possibility of natural pregnancy is extremely low.
Aspect 2: Basic concepts and processes of IVF
In vitro fertilization embryo transfer (IVF-ET) is a reproductive medicine technology, which is used to help infertile couples achieve their reproductive aspirations. This technology combines sperm and egg in vitro, forms embryo, and then transfers the embryo to the female uterus to promote pregnancy.
The process of IVF usually includes the following steps:
1. Ovulation promotion: use drugs to stimulate female ovaries to ovulate and produce multiple mature eggs.
2. Egg taking: puncture the ovary with a fine needle guided by ultrasound to take out the eggs.
3. Sperm extraction: Collect semen provided by men. Sperm is usually obtained by artificial ejaculation and other methods.
4. Fertilization and culture: combine the extracted sperm and egg in the laboratory and culture them into embryos.
5. Transfer: transfer the cultivated embryo into the female uterus through the endometrium.
Aspect 3: Effect of ligation on IVF
Since ligation will block the encounter of eggs and sperm and fertilization process, the probability of natural pregnancy after ligation is low. However, ligation does not completely rule out the possibility of IVF.
For women, after tubal ligation surgery, embryos can be implanted into the uterus. Even if the tubal ligation is performed, the embryos can continue to develop in the uterus and achieve pregnancy.
For men, sperm extracted after vasectomy can be injected into the egg through ICSI (single sperm injection) technology to achieve fertilization.
Therefore, ligation does not completely prevent the realization of IVF, but medical technology and medical means are needed to help the process of fertilization and pregnancy.
Aspect 4: Success rate and medical conditions of IVF
Although IVF technology can help many infertile couples achieve their reproductive aspirations, its success rate is affected by many factors.
First, age is an important factor. When women are over 35 years old, the quality and quantity of eggs will gradually decrease, and the success rate will decline.
Secondly, the quality of fertilized eggs is also an important factor affecting the success rate. The quality of sperm and eggs extracted by ligation may be poor, resulting in fertilization and embryo development problems.
In addition, medical conditions and technical level also affect the success rate. Regular hospitals and experienced doctors can provide better technology and medical services to improve the success rate of IVF.
Summary
The possibility of IVF pregnancy after ligation depends on many factors. Ligation will block the encounter of eggs and sperm and fertilization process, reducing the chance of natural pregnancy. However, IVF technology can help infertile couples achieve their fertility aspirations through in vitro fertilization and embryo transfer. For women, pregnancy can be achieved through embryo transfer into the uterus after tubal ligation; For men, fertilization can be achieved through ICSI technology after vasectomy. However, the success rate of IVF is affected by many factors, such as age, quality of fertilized eggs, medical conditions and technical level.
