Unexplained infertility is a frustrating condition, not just for the couples but also their doctors. A couple is labelled as having unexplained infertility when the basic work up of the couple does not reveal a clear reason as to why a couple is having difficulty in becoming pregnant. Not just that it is a dilemma for the patient that why they are not getting pregnant, also it poses a big challenge for the treating infertility specialist on how to proceed. Unfortunately, there is no single treatment option that provides an edge above the others.
Infertility is defined as the inability to conceive after a year of unprotected intercourse. Infertility affects about 10 -15% of women ages 15 to 44. For those desiring a baby, the inability to get pregnant can have devastating social, psychological and physical effects. The drive to seek treatment and going to any extent to achieve the same is understandable.
Management Strategy
The first logical step is a detailed evaluation of the couple. Infertility is caused by female factors in one thirds of the patients, male factors in another one thirds and combined male and female factors in remaining one thirds. The most common causes accounting for infertility in India are sperm abnormalities (low sperm counts and motility/ speed or no sperms at all) leading to male factor infertility, and in women, a hormone condition called polycystic ovarian disease or PCOD. Other important causes are blocked fallopian tubes which may be due to past infections, tuberculosis, endometriosis, surgeries etc. In 10-15 % of all infertile couples, there is no cause found for infertility on routine investigations, such cases are called “unexplained infertility.”
Many couple with “unexplained infertility” will get pregnant with watchful expectancy which means without ivf treatment but trying naturally. It is still not advisable to wait naturally beyond 2 years of trying as the chances of conceiving without medical aid start decreasing thereafter. Once a decision to start treatment is taken, the first step in young couples could be to try using medicines for ovulation induction to push the ovaries to produce more than more one egg (multifollicular response) to increase the chances of sperms fertilising the egg. For some couple, doctor may advise intrauterine insemination or IUI. This has a proven role in couple with “unexplained infertility”. This therapy is simpler and much less expensive and cost effective than in vitro fertilization (IVF). Although a couple may have to go for repeated cycles of IUI to enhance the probability of conceiving. In IUI, sperms are centrifuged and through special semen preparation techniques, the best sperms are selected, loaded in a fine tube or catheter and gently deposited inside wife’s uterus at around 12-16th day of woman’s menstrual cycle as this is the time when the eggs mature and rupture inside a woman’s body. This cycle has to be carefully monitored with serial ultrasounds.
Sometimes your fertility doctor may also advise you to directly go for IVF (In Vitro Fertilization). Doctor has to take into account various factors like age of both the partners, ovarian reserve, tubal status, duration of infertility, previous response to treatment, semen profile etc. before making the final strategy. Another thing to remember is that the choice is only based on the chances to conceive. No treatment can ever guarantee us a pregnancy.
Although medical breakthroughs have helped improve and optimise treatment results, it is equally important to minimise multiple pregnancies and complications arising out of the treatment. Proper counselling about success rates and possible complications before starting with the treatment is very important. The desired and heartfelt goal of infertile couples and their doctors isn’t just achieving a pregnancy, but a pregnancy with a good outcome—a healthy mother and a healthy baby
In Vitro Fertilization(IVF) is an assisted reproductive technique (ART) also referred to as ‘testtube baby’ in common language. IVF is a process where eggs are developed inside a female’s body by use of certain hormone injections followed by extraction of eggs outside the body. The extracted eggs are then made to fertilise with husband’s sperms through conventional IVF or through Intra Cytoplasmic Sperm Injection (ICSI). The embryos thus formed are cultured carefully in an IVF lab and incubated. After two or three days, the embryos formed are assessed. The best embryo(s) are transferred inside women’s uterus(womb).
Who should undergo IVF?
IVF can be used for couples with infertility in the following cases:
- Blocked orfunctionally damaged fallopian tubes or women with previous ectopic pregnancies resulting in removal of tubes.
- Women with advanced age (Age >37 years or with low AMH)
- Male factor infertility including decreased sperm count or sperm motility, abnormal morphology.
- Individuals with a genetic disorders
- Unexplained infertility, when other treatments like Intra Uterine Insemination (IUI) have already failed.
There are five basic steps in the IVF and embryo transfer process:
Step 1: Controlled ovarian stimulation: certain injections are prescribed to stimulate egg production. Fertility doctors try to produce multiple eggs so that even if a few eggs are not fertilised, still there are adequate embryos that multiple embryo transfer attempts can be made. A transvaginal ultrasound(TVS) is done on second or third day of periods and after confirming that ovaries are silent, dose of injections is decided according to expected number of eggs that can be obtained. Follicular monitoring is done after four days to check for the response. The dose of injections is modified accordingly and the monitoring is done every 2/3 days.
Step 2: Oocyte retrieval/ Oocyte pick up (OPU): Eggs are retrieved under short general anaesthesia (GA) through a minor surgical procedure that uses ultrasound imaging to guide a hollow needle through the vagina to remove the eggs. This procedure does not involve any cuts or stiches. It takes around 15-20 minutes in experienced hands.
Step 3: Collection of semen sample: The male is asked to produce a sample of sperm through masturbation in a private room. These sperms are then processed by washing in specific culture media and rotating in a centrifuge. The best sperms thus obtained can then be used for inseminating the eggs.
Step 4: Insemination: The sperm and eggs are mixed together in a culture dish and placed carefully in an incubator. Next day these eggs are checked for fertilisation. In some casesintracytoplasmic sperm injection (ICSI) is done where each oocyte is injected with one sperm under microscope. Once fertilisation happens, the eggs are labelled as embryos. These embryos are further cultured till third day.
Step 5: Embryo transfer: The embryos are transferred into the woman’s uterus three to five days following egg retrieval. The embryos are carefully placed inside woman’s uterus under ultrasound guidance. This procedure does not require anaesthesia in most of the cases.
Step 6: Luteal Phase Support: The woman is then given a set of medicines (oral, vaginal or injectables) to support the pregnancy by supporting the lining of uterus or endometrium. She has to take medicines for two weeks.
Step 7: Beta HCG blood testing: To know whether pregnancy has happened or not.
Success rates of in vitro fertilization (IVF)?
The success rate of IVF depends on a number of factors including maternal age, the cause of infertility, quality of eggs and sperms and lifestyle factors. It is also important to understand that pregnancy rates are not the same as live birth rates. Once the blood test is positive, it is labelled as chemical pregnancy. Once the pregnancy is detected on an ultrasound scan, it is labelled as clinical pregnancy. Once a lady gives birth to a healthy baby, it is labelled as a live birth. So, whenever we talk about success rates, we should understand that it is the live birth rate that is actually important
In most of the advanced countries like USA and parts of Europe, the live birth rate for each IVF cycle started is approximately:
- 40-45%for women under age 35
- 32-36%for women ages 35 to 37
- 22-28%for women ages 38 to 40
- 15-18%for women ages over 40
In India also, IVF technology has advanced a lot and good IVF centres have reached similar success rates. But the irony in India is that there is no database and each centre is quoting their own success rates which are falsely high just for the purpose of trapping or attracting more and more patients. Some centres even give a ‘money back guarantee’. This practice has to be discouraged. Also, to know about the real success rates, one must go by genuine articles and sites, and not by individual blogs or advertisements. Vasundhara hospital and fertility research centre is one of the most advanced fertility and IVF centre in Jaipur and offers counselling about individualised success rates to the couple depending on a lot of factors like age, medical reports and previous history of treatment.
Use of donor eggs or sperms
It is important to note that the use of donor eggs or sperms is restricted for special cases where the wife is not able to produce her own eggs due to advanced age or poor ovarian reserve or where the husband has very poor quality or nil sperms and can not be retrieved or used for the purpose of IVF. The embryo thus formed is thus not genetically related to one of the parents but the embryo harbours inside the uterus of the lady and hence biological connection is established. As a policy, our hospital discourages the practice of using donor gametes (eggs or sperms) for not so clear reasons. Encouraging self eggs or sperms should be the aim of every IVF done. Also, it is important to know that success rates might be better with the use of donor gametes.
How many IVF cycles can be done for a couple?
There is no fixed number of IVF cycle that should not be exceeded. But as the procedure is both financially and physically draining, we should make our best efforts to optimise each and every cycle.
