Читать книгу Assisted Reproduction Techniques - Группа авторов - Страница 220

1  Q1 Why is my embryo transfer difficult? A1. The canal that leads into the cavity of your womb (called the cervix or the neck of the womb) is very tight. This is rare and occurs in 1 out of every 100 women and doesn’t harm your health in anyway. It just can lead to difficulty in embryo transfer, but there are steps we can take to overcome that difficulty. It may result from previous surgery but in most case no cause is known.

2  Q2 I had surgery on the cervix for abnormal smears and was told that it may make my embryo transfer difficult. Will this affect my success rate and what are you going to do about it? A2. In some case surgery on the cervix can lead to narrowing, which can make embryo transfer difficult. A difficult embryo transfer can reduce the chance of pregnancy, and that is why we need to be prepared. Before you start your IVF treatment, we will do a “trial” embryo transfer, when we will try to pass the embryo transfer catheter (a small plastic tube) through the cervix, just like the real thing but without embryos. If that goes well, then your embryo transfer will be easy. If we encounter any difficulty, then we will plan how to overcome it, either by dilating the cervix or using a special transfer catheter. That way, when we get to the real embryo transfer, we will be ready, and your transfer will be easy.

3  Q3 What will happen if my embryo transfer turns out to be difficult on the day of the treatment? A3. We will try using different catheters or techniques to make it easy, but if we couldn’t, we will freeze the embryos and then work out a plan to overcome the tight cervix (which may involve dilating it or using special catheters) and then do the embryo transfer on a later date. Studies have shown that the pregnancy rate from frozen embryos is as good as fresh embryos. Our aim is to give you the highest pregnancy rate through an easy transfer, and if that could not be done on the planned date, then it is better to freeze the embryos.