What Can Contribute To In Vitro Fertilization (IVF) Success Rates
IVF, or in vitro fertilization, is a pregnancy technique in a laboratory setting, where a man's sperm is added to the woman's egg. Couples may chose this route if they cannot conceive naturally, but are still willing to have children. For women it may be tubular blocking or cervical issues, and in men sperm quality and quantity can be the problem. IVF success rates can be dependent on many factors.
Age is a prominent factor in the success rates, and the general attitude is that the younger a woman is, the more likely it is she will be able to succeed with IVF. Women aged under 35 had around a 33% of success, and women over 44 had around a 5% chance, though these statistics are not accurate. Progressive technology advances suggest an increase in success each year.
IVF success can be affected by the physician administering the treatment, and the clinic they operate in. Large centers are more successful than smaller ones, and the difference between doctors in the same clinic can be as much as 32%. This could be a reflection on the ability of the physician, but it could also be that some physicians attract older women with less chance of success.
Cancellation of the process is also factored in, as around 12% of IVF cycles are cancelled before the egg is collected. The most common causes for this are poor (or no) egg production (83%), or the patient having personal reasons to discontinue (10%). This is more likely as patient age increases, suggesting age correlates with lessened egg production. For women under 35 this is estimated at around 9%, whilst women over 40 are at around 42%.
It is usually the case that at least one member of the couple attending for IVF has fertility problems. An option is to receive donor sperm or eggs, which can be more successful in treatment. Couples who use their own sperm and eggs tend to be less successful than donated equivalents, and the delivery rate of live births for these donor eggs were 40% per transfer, against 30% for non-donor. Transfer is the term used for a replaced embryo.
A higher transfer number can induce a higher chance of a live baby. One transfer has a low rate, as well as a low risk of multiple pregnancies. Three has a much higher chance of both. In the UK, only women over 40 can have a third transfer. Some evidence is present which suggests replacing two embryos is just as effective as three, however does not carry the same risk of multiple pregnancies.
Couples who have been infertile for longer are less likely to have a live birth baby. Those who have been infertile only recently have around a 20% chance of success, whilst those lasting over 12 years drop to around 11%. Factors to this seem to vary in significance, where the influence of the male is less than the influence of endometriosis or tubular issues.
Previous pregnancies and pregnancies through IVF can help to boost the success rate, but lifestyle can also affect things as overweight women are less likely to become pregnant, or take longer to. Smoking also appears to reduce the chance of pregnancy, and race seems to have influence on IVF success rates based on distribution of fat, or which medical conditions they are vulnerable to.
There are many ways that can influence for your IVF success rates. Find more resources at GettingPregnantCenter.com. If you are looking for information on how to get pregnant fast and naturally by improving your fertility, you can find resources for that too.
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