Causes of difficult pregnancy
Many couples face difficulties in pregnancy when they want to have children. There are many reasons for difficult pregnancy. Let's take a closer look.

First of all, age is an important factor leading to difficulties in pregnancy. With the growth of age, the number and quality of female eggs will gradually decline, thus reducing the chance of pregnancy. This is especially true for women over 35 years old.
Secondly, suffering from gynecological diseases is also one of the common reasons for difficult pregnancy. For example, gynecological diseases such as endometriosis and polycystic ovary syndrome will affect the development and excretion of eggs, thus reducing the possibility of pregnancy.
In addition, male infertility is also an important reason for couples' difficulties in pregnancy. The quality and quantity of men's sperm will also be affected by many factors, such as drugs, environmental pollution, etc., which will lead to abnormal fertilization of sperm and affect the chance of pregnancy.
Finally, psychological pressure will also have an impact on pregnancy. Long term anxiety, tension and stress will affect women's endocrine system and egg development, reducing the chance of successful pregnancy.
Can IVF choose multiple births?
For some couples who cannot conceive naturally, IVF technology is a common solution. So, can they choose multiple births? Now let's take a look.
In the process of IVF, the fertilized egg is usually transplanted back to the female uterus. According to the doctor's advice and the actual situation, couples can choose to transplant one or more fertilized eggs back to the uterus. Therefore, multiple births can be selected during IVF.
However, there are some risks to consider when choosing multiple births. Compared with singleton pregnancy, multiple pregnancy has a higher risk, including premature delivery, birth defects, etc. Therefore, couples need to fully understand these risks when choosing multiple births, and make decisions after discussing with doctors.
In addition, it needs to be clear that IVF does not guarantee successful pregnancy, so IVF cannot be used as a means of random selection of multiple births. Doctors will provide reasonable suggestions for couples to select the most appropriate number of embryos according to the actual situation.
Introduction to relevant hospitals
In China, there are many well-known hospitals that provide IVF technology. For example, Peking Union Medical College Hospital, Shanghai Jiaotong University School of Medicine Affiliated Pediatrics Hospital, etc. These hospitals have first-class technical equipment and professional medical teams, which can provide couples with high-quality IVF services.
Peking Union Medical College Hospital is one of the famous general hospitals in China, with many years of experience in IVF technology. The hospital has a special reproductive medical center to provide test tube babies, assisted reproduction and other technical services.
The Pediatric Hospital of Shanghai Jiaotong University School of Medicine is one of the first hospitals in China to carry out IVF. The hospital has a medical team composed of pediatricians, reproductive medicine, genetics and other professionals, providing couples with comprehensive IVF services.
Summary
The reasons for difficult pregnancy include age, gynecological diseases, male infertility and psychological pressure. For couples who cannot conceive naturally, IVF technology is a solution. In the process of IVF, multiple fetuses can be selected, but the risk of multiple pregnancy should be noted. There are many well-known hospitals in China that provide IVF technology, such as Peking Union Medical College Hospital, Shanghai Jiaotong University Medical College Affiliated Pediatric Hospital, etc.