Starting a new cycle will start anticipation and building excitement, you will hope this will be your family's start but you will worry at the same time. An unsuccessful IVF cycle can reveal very upsetting emotions.
The most important factors determining the success rates in IVF treatment are the correct diagnosis of the problem, correct patient selection, and choosing the most appropriate treatment plans and methods for the couples, and individualize their treatment options. Besides these the age of the woman, the duration of infertility, the male factor, obtaining good quality embryos, eliminating the additional problems in man and woman before starting treatment, the experience of the physician are important factors affecting the success.
These appear as factors that can negatively affect the success of IVF treatment:
What you eat affects the health of you or your partner’s eggs and sperm. Women can decrease infertility risk due to ovulation disorders by 80% with healthy dietary changes. Numerous scientific studies have found improved fertility rates with an IVF diet centred around vegetables, fruits, plant-based proteins, whole grains, fish, monounsaturated fats healthy fats like olive oil and nuts (A Mediterranean diet).
How you exercise can also impact your success with IVF. Moderate exercise (15-60 minutes) can reduce the risk of infertility, and improve sperm quality. Extreme exercise can cause infertility.
We advice to stop smoking at least three months before starting IVF treatment. Studies show that smoking increases your risk for infertility by 13%. Smoking also increases your risk for a miscarriage and can cause birth defects. Women who smoke need twice as many IVF cycles to conceive.
Women who are overweight or underweight are less likely to have successful IVF treatment. If you are overweight, losing as little as 10 percent of your body weight can make a positive difference in your ability to get pregnant.
Sometimes a woman’s ovaries do not respond to the fertility medications strongly enough to produce multiple eggs. Poor response is not a rare occurrence in ovarian stimulation. These patients have lower pregnancy rates compared with normal responders, following a standard ovarian stimulation protocol. Particularly, if a woman is over 37 or has higher FSH levels she may not produce enough eggs to result in a number of embryos for screening and potential implantation. In these cases, the risk of IVF failure increases.
The quality and quantity of a woman’s eggs, known as her ovarian reserve, begin to get worse as she gets older. It is a well-known fact that younger women get pregnant more than older women.
The main reason here is that eggs taken from older women are more prone to genetic defects such as aneuploidies (presence of the wrong number of chromosomes) and contain incorrect or insufficient genetic information required to create a healthy baby. The embryos formed when such eggs are fertilized are also genetically deficient embryos. These embryos will not implant or result in early miscarriage if they are implanted. Rarely, if the birth occurs, the newborn baby may be genetically defective. This clearly shows that embryo competency plays a major role in implantation. Women under 35 using their own eggs for IVF have an implantation rate of about 45 percent. Women 40 to 42 years old using their own eggs have only about a 15 percent chance of implantation. This is why older women require more attempts than their younger counterparts to succeed with IVF.
One of the major factors in IVF failure is chromosomal abnormalities in the embryo. These abnormalities are the reason behind most miscarriages as well as failure to implant in an IVF cycle.
In IVF failures preimplantation genetic screening (PGS) is recommend. With the advent of comprehensive chromosome screening, it is now possible to screen all 24 chromosomes (22 autosomes and 2 sex chromosomes) for the presence of aneuploidy. However, the effectiveness of PGS to increase live birth via IVF in clinical practice is still not proven.
Problems of the uterus and uterine lining that can cause or contribute to IVF treatment failure or to recurrent miscarriage: