In the natural process of conception without treatment, a woman’s ovaries produce a mature egg each month, which leaves the ovary and travels along the fallopian tube towards the uterus. Sperm that has been deposited in the vagina through intercourse travels through the cervix through the uterus and up the fallopian tube toward the egg. Millions of sperm are lost in the cervix and do not travel to the fallopian tube. When the two meet, they join to form the early stage of an embryo which then travels down the fallopian tube into the uterus. If all goes well, it will implant in the lining of the womb and pregnancy begins.

Regardless of pregnancy result, IVF treatment is usually stressful for patients.[42] Neuroticism and the use of escapist coping strategies are associated with a higher degree of distress, while the presence of social support has a relieving effect.[42] A negative pregnancy test after IVF is associated with an increased risk for depression in women, but not with any increased risk of developing anxiety disorders.[43] Pregnancy test results do not seem to be a risk factor for depression or anxiety among men.[43]
Availability of IVF in England is determined by Clinical commissioning groups. The National Institute for Health and Care Excellence recommends up to 3 cycles of treatment for women under 40 years old with minimal success conceiving after 2 years of unprotected sex. Cycles will not be continued for women who are older than 40 years old.[156] CCGs in Essex, Bedfordshire and Somerset have reduced funding to one cycle, or none, and it is expected that reductions will become more widespread. Funding may be available in "exceptional circumstances" – for example if a male partner has a transmittable infection or one partner is affected by cancer treatment. According to the campaign group Fertility Fairness at the end of 2014 every CCG in England was funding at least one cycle of IVF".[157] Prices paid by the NHS in England varied between under £3,000 to more than £6,000 in 2014/5.[158] In February 2013, the cost of implementing the NICE guidelines for IVF along with other treatments for infertility was projected to be £236,000 per year per 100,000 members of the population.[159]
Infertility is a medical condition, and a fertility specialist can help with thorough, focused examinations directed at discovering the underlying cause. For every couple that begins an evaluation, about 35% discover that there is an issue with the man which is contributing to the couple’s infertility. 50% is related to female factor while 5% is due to rare causes. The remaining 10% (1 in 5 couples) is due to unexplained infertility despite completing a full infertility work-up.(2)
For most couples having difficulty achieving a pregnancy their chance of achieving a pregnancy is not zero, it is just lower than the average rate of conception—unless both Fallopian tubes are completely blocked, there is no sperm, or the woman never ovulates. Ovulation induction (or superovulation) with IUI helps patients to achieve pregnancy rates closer to the natural per cycle chance of pregnancy for women in their age group who do not have infertility (see fig 1).

Only 30 percent of patients who receive 100 mg of Clomiphene a day will produce more than three follicles. Patients that produce less than than three follicles have about half the chance of getting pregnant than those that produce greater than three follicles. Patients that receive fertility medications but do not do an insemination have only half the success rates compared to those who do.