The realization of in vitro twins requires a range of conditions, including the age of the female, ovarian reserve function, membrane status, sperm mass and embryo quality. In addition, suitable ovulation programmes need to be selected, spermizing and embryo transplantation carried out and post-operative care provided in strict compliance with medical advice. The success rate is also closely related to the doctor's level of skills, laboratory conditions and the patient's own state of health, and not all couples who try to test a baby have access to twins and not all twins are healthy。
What are the requirements for successful pregnancy of the in vitro twins? It's the reason why twins are affected
Factors affecting the success rate of test tube twins
The success rate of test tube twins is not 100 per cent and is influenced by many factors. Doctors develop individualized treatments tailored to the specific circumstances of the patient to improve success to a greater extent, but there is uncertainty about the end result. Key factors affecting success rates include, inter alia:
Female age: female age is one of the more important factors influencing the success rate of in vitro infants. As age increases, ovarian functions decline, the quality of the eggs falls, and the risk of chromosomal anomalies increases, thus reducing the success rate of in vitro babies, including the chances of obtaining twins. Young women often have better ovarian reserves and higher success rates。
Ovarian storage function: the ovarian storage function is the quantity and quality of the remaining ovaries in the ovaries. The ovarian reserve function can be assessed through tests such as amh horizontal tests and basic ovulation counts. The better the ovarian reserve function, the greater the likelihood that more quality eggs will become available, thus increasing the chances of obtaining twins. If the ovarian reserve is less functional, complementary measures, such as the use of higher doses of ovulation drugs, are required, while increasing the risk of multiple pregnancies。
Endometriosis: the endomelet of the uterus is the place where the embryo is bed-beded, and the thickness, morphology and blood flow of the endomelet affect the incidence of the embryo. The success rate of in vitro infants, including twin pregnancies, is reduced if the endomelet conditions are poor. Doctors assess uterine membranes by means of ultrasound tests and take appropriate treatment measures, such as improving the thickness and blood flow of uterine membranes。
Quality of sperm: the quantity, vitality, form, etc. Of sperm affect the fertilization rate and the quality of embryos. Poor sperm quality reduces fertilization and embryo development potential, thus affecting the success rate of in vitro infants, including twins. Men need semen analysis to assess sperm quality, and if sperm quality is poor, sperm washing or other assisted reproduction techniques can be considered。
Embroidery quality: the quality of embryos is a key factor influencing the success rate of in vitro babies. High-quality embryos are in good shape, are fast growing, have normal chromosomes and have higher bed and pregnancy rates. The quality of embryos is influenced by factors such as the quality of sperm and eggs and the conditions for their development. Doctors conduct morphological assessments and genetic screening of embryos and select high-quality embryos for transplantation。
Ovulation programmes: the choice of ovulation programmes affects the quantity and quality of eggs obtained. Doctors select suitable ovulation programmes, such as long-term programmes, short-term programmes, microstimulation programmes, etc., depending on the patient's circumstances. Different ovulation programmes receive different numbers of eggs, thus affecting the chances of obtaining twins. The choice of appropriate ovulation options is key to improving success rates。
Embroidery transplantation technology: the high and low levels of embryo transplantation technology can also affect success rates. Experienced embryoologists were able to assess the quality of embryos more accurately and to select suitable embryos for transplantation, thereby increasing success rates. In addition, the selection of suitable embryo transplants, such as single embryo transplants or multiple embryo transplants, can affect pregnancy outcomes。
Consideration of twin transplants
In order to reduce the risk of multiple pregnancies, as well as to improve the survival and health status of each foetus, doctors usually prefer single embryo transplantation (set). Although multiple embryo transplants can increase the pregnancy rate, multiple pregnancies increase risks such as premature births, low birth weight and complications during pregnancy, with potential threats to the health of both mothers and infants. The transplantation of multiple embryos will be considered only if, following a medical assessment, the patient's state of health is considered permissible and the risk is manageable, in order to increase the likelihood of obtaining twins. Even if multiple embryos were transplanted, it was not always possible to obtain twins, since there were individual differences in the incidence and development of embryos。
Access to in vitro twins is subject to a wide range of conditions, including female age, ovarian function, uterine membrane status, sperm quality, embryo quality and doctor's technical level. While the transplantation of multiple embryos increases the likelihood of obtaining twins, doctors weigh the advantages and disadvantages, giving priority to reducing the risk of multiple pregnancies. The ultimate success rate is influenced by a number of factors, not all couples who try an in vitro baby have access to twins and not all twins are healthy. Therefore, prior to treatment of in vitro infants, both spouses need to be fully aware of the risks and success rates involved and fully communicate with doctors to develop appropriate treatment programmes。
