In order for pregnancy to happen, sperm has to meet the egg. This normally takes place at the end of the fallopian tube, and this is called fertilization. There are a number of obstacles that can prevent this from happening, and the process itself even in healthy young fertile women is very complex- hence the low pregnancy rate each month. Obstacles such as cycle timing, low sperm count, poor sperm motility, blocked fallopian tubes, or endometriosis must be overcome to achieve a pregnancy. Timing is often the most common obstacle to conception. What does it mean for you when common causes of infertility are ruled out and you’re told you have unexplained infertility? It should mean a time of hope.
IVF increasingly appears on NHS treatments blacklists.[160] In August 2017 five of the 208 CCGs had stopped funding IVF completely and others were considering doing so.[161] By October 2017 only 25 CCGs were delivering the three recommended NHS IVF cycles to eligible women under 40.[162] Policies could fall foul of discrimination laws if they treat same sex couples differently from heterosexual ones.[163] In July 2019 Jackie Doyle-Price said that women were registering with surgeries further away from their own home in order to get around CCG rationing policies.[164]

Advanced technologies add to your IVF bill but may also make a huge difference to your success rate. Pre-implantation genetic screening (PGS) can improve implantation rate by selectively transferring genetically normal embryos. For couples with male factor infertility, Intracytoplasmic sperm injection (ICSI) can help deliver a sperm directly into the egg. Nevertheless, ICSI only improves success rate in couples with severe male infertility.
When the ovarian follicles have reached a certain degree of development, induction of final oocyte maturation is performed, generally by an injection of human chorionic gonadotropin (hCG). Commonly, this is known as the "trigger shot."[67] hCG acts as an analogue of luteinising hormone, and ovulation would occur between 38 and 40 hours after a single HCG injection,[68] but the egg retrieval is performed at a time usually between 34 and 36 hours after hCG injection, that is, just prior to when the follicles would rupture. This avails for scheduling the egg retrieval procedure at a time where the eggs are fully mature. HCG injection confers a risk of ovarian hyperstimulation syndrome. Using a GnRH agonist instead of hCG eliminates most of the risk of ovarian hyperstimulation syndrome, but with a reduced delivery rate if the embryos are transferred fresh.[69] For this reason, many centers will freeze all oocytes or embryos following agonist trigger.
Low weight: Obesity is not the only way in which weight can impact fertility. Men who are underweight tend to have lower sperm concentrations than those who are at a normal BMI. For women, being underweight and having extremely low amounts of body fat are associated with ovarian dysfunction and infertility and they have a higher risk for preterm birth. Eating disorders such as anorexia nervosa are also associated with extremely low BMI. Although relatively uncommon, eating disorders can negatively affect menstruation, fertility, and maternal and fetal well-being.
DNA damage reduces fertility in male sperm, as caused by oxidative DNA damage,[31] smoking,[28] other xenobiotic DNA damaging agents (such as drugs or chemotherapy)[32] or other DNA damaging agents including reactive oxygen species, fever or high testicular temperature.[33] The damaged DNA related to infertility manifests itself by the increased susceptibility to denaturation inducible by heat or acid [34] or by the presence of double-strand breaks that can be detected by the TUNEL assay.[35]
Pelvic inflammatory disease (PID) is the most common and serious complication of sexually transmitted diseases (STDs), aside from AIDS, among women. The signs and symptoms of pelvic inflammatory disease include: fever, vaginal discharge with a foul odor, abdominal pain, including pain during intercourse, and irregular vaginal bleeding. Pelvic inflammatory disease can scar the Fallopian tubes, ovaries, and related structures and lead to ectopic pregnancies, infertility, chronic pelvic pain, and other serious consequences. Pelvic inflammatory disease treatment includes several types of antibiotics.

Unfortunately, a couple cannot look at the TMC from a semen analysis and know precisely where they fit into this rubrik. That is because the TMCs recorded above were measured after the man already had his sperm washed for IUI. A sperm wash can lower TMCs by roughly 30% and a credible rule of thumb for a general estimate would be to take the “pre-wash” TMC from a semen analysis, subtract a third, then presume that will be the “post-wash” TMC and apply it to the above charts.
The NHS recommends that, after trying and failing to get pregnant for a year, you should see your doctor; if you are over 35, you should go after six months. Help is out there, if you want it, and takes many forms. West stresses the importance of investigating both the women and the men, "even if they have previously had a healthy sperm analysis because situations and lifestyles can change". There is also the alternative therapy route: acupuncture, hypnotherapy, reflexology, meditation. Or, if all else fails, you could, like me, go for in-vitro fertilisation (IVF).
A genetic disorder. If you or your partner is at risk of passing on a genetic disorder to your child, you may be candidates for preimplantation genetic testing — a procedure that involves IVF. After the eggs are harvested and fertilized, they're screened for certain genetic problems, although not all genetic problems can be found. Embryos that don't contain identified problems can be transferred to the uterus.

Our physicians generally perform IUIs 1 and a 1/2 days after the trigger injection, which sets ovulation in motion. The exact timing of insemination is not critical to the exact time of ovulation. Both the sperm and the egg remain viable in the female genital tract for many hours, so the physician may time the insemination within a window of several hours around the time of ovulation. Following the IUI, you will take daily supplemental progesterone—usually in the form of a capsule inserted into your vagina twice a day—to support the endometrial lining of the uterus and implantation of the embryo.

All pregnancies can be risky, but there are greater risk for women who are older and are over the age of 40. The older the women the riskier the pregnancy. As women get older, they are more likely to suffer from conditions such as gestational diabetes and pre-eclampsia. If older women do conceive over the age of 40, their offspring may be of lower birth weight, and more likely to requires intensive care. Because of this, the increased risk is a sufficient cause for concern. The high incidence of caesarean in older mothers is commonly regarded as a risk.
Antisperm antibodies (ASA) have been considered as infertility cause in around 10–30% of infertile couples.[23] In both men and women, ASA production are directed against surface antigens on sperm, which can interfere with sperm motility and transport through the female reproductive tract, inhibiting capacitation and acrosome reaction, impaired fertilization, influence on the implantation process, and impaired growth and development of the embryo. The antibodies are classified into different groups: There are IgA, IgG and IgM antibodies. They also differ in the location of the spermatozoon they bind on (head, mid piece, tail). Factors contributing to the formation of antisperm antibodies in women are disturbance of normal immunoregulatory mechanisms, infection, violation of the integrity of the mucous membranes, rape and unprotected oral or anal sex. Risk factors for the formation of antisperm antibodies in men include the breakdown of the blood‑testis barrier, trauma and surgery, orchitis, varicocele, infections, prostatitis, testicular cancer, failure of immunosuppression and unprotected receptive anal or oral sex with men.[23][24]
Few American courts have addressed the issue of the "property" status of a frozen embryo. This issue might arise in the context of a divorce case, in which a court would need to determine which spouse would be able to decide the disposition of the embryos. It could also arise in the context of a dispute between a sperm donor and egg donor, even if they were unmarried. In 2015, an Illinois court held that such disputes could be decided by reference to any contract between the parents-to-be. In the absence of a contract, the court would weigh the relative interests of the parties.[190]
This information is designed as an educational aid to patients and sets forth current information and opinions related to women’s health. It is not intended as a statement of the standard of care, nor does it comprise all proper treatments or methods of care. It is not a substitute for a treating clinician’s independent professional judgment. Read ACOG’s complete disclaimer.
I had a wonderful experience at CHA Fertility Clinic and got pregnant on my first cycle.  My son will turn two this year and I immediately contacted them when we were thinking of having a second child.  The doctors and staff are so kind, informative, and helpful, and they really put my mind at ease.  We had looked at other fertility clinics … Read More
While ICSI is a more invasive procedure, some have suggested it may help by reducing the risk of failed fertilisation. However, it's emerging that IVF is probably the preferred treatment, at least in the first cycle, in "unexplained" infertility. IVF allows for healthy competition between sperm, is less expensive, avoids trauma to the egg and may produce more embryos, with better pregnancy and live birth rates  
After your body releases an egg, the hormone progesterone kicks in to build and maintain the lining of the uterus. It makes your body temperature go up slightly. So taking your temperature with a basal thermometer every morning before you get out of bed can help you figure out if you ovulated. You can buy these thermometers at the drugstore. They're inexpensive, but they aren't as accurate as other ways of tracking ovulation.
Nadya Suleman came to international attention after having twelve embryos implanted, eight of which survived, resulting in eight newborns being added to her existing six-child family. The Medical Board of California sought to have fertility doctor Michael Kamrava, who treated Suleman, stripped of his licence. State officials allege that performing Suleman's procedure is evidence of unreasonable judgment, substandard care, and a lack of concern for the eight children she would conceive and the six she was already struggling to raise. On 1 June 2011 the Medical Board issued a ruling that Kamrava's medical licence be revoked effective 1 July 2011.[116][117] [118]
One of the worst parts of infertility – or the fear of being infertile – is friends and family members getting pregnant accidentally! “Today, my child-hating friend who vowed never to have kids no matter what, announced that she’s pregnant,” says Charity. “I’ve had three IVF (in vitro fertilization) cycles, spent $90,000 in fertility treatments, and still can’t conceive a baby. WTF?”
^ Tan K, An L, Miao K, Ren L, Hou Z, Tao L, Zhang Z, Wang X, Xia W, Liu J, Wang Z, Xi G, Gao S, Sui L, Zhu DS, Wang S, Wu Z, Bach I, Chen DB, Tian J (March 2016). "Impaired imprinted X chromosome inactivation is responsible for the skewed sex ratio following in vitro fertilization". Proceedings of the National Academy of Sciences of the United States of America. 113 (12): 3197–202. Bibcode:2016PNAS..113.3197T. doi:10.1073/pnas.1523538113. PMC 4812732. PMID 26951653.
When Sarah Bozinovich and her husband, Joe, decided to start a family, they were amazed by how quickly they were on the road to parenthood. "I went off birth control in April and was pregnant in May," says Bozinovich, of Mokena, Illinois. About a year and a half after their daughter's arrival, the couple was ready to expand their family. But they'd try for more than two years and endure many medical tests and fertility treatments to have the second child they so badly wanted. Like many other parents, they struggled with secondary infertility, the inability to conceive or carry a baby to term after having one or more children. Says Bozinovich, who was 27 when her problems began, "It's so surprising because no one could tell me why I couldn't get pregnant, when I got pregnant so easily before."
The Human Fertilisation and Embryology Authority said in September 2018 that parents who are limited to one cycle of IVF, or have to fund it themselves, are more likely choose to implant multiple embryos in the hope it increases the chances of pregnancy. This significantly increases the chance of multiple births and the associated poor outcomes, which would increase NHS costs. The president of the Royal College of Obstetricians and Gynaecologists said that funding 3 cycles was "the most important factor in maintaining low rates of multiple pregnancies and reduce(s) associated complications".[165]

In the well-established fertility treatment of IVF, unlike IUI, the meeting of sperm and egg takes place outside the body, in the laboratory (in vitro). This gives fertility practitioners a lot more control over the selection of a genetically normal embryo that has the best chance of establishing a successful pregnancy. IVF is the fertility treatment with the highest likelihood of taking home a healthy baby. These are the stages involved in IVF:
Intracytoplasmic sperm injection (ICSI): This procedure involves direct injection of a single sperm of the male partner into the eggs of the female for fertilization. Just like IVF procedure, in ICSI, the sperm and egg are collected from both the partners. The only difference is the fertilization process as in IVF the sperms and egg are mixed naturally, and in ICSI the sperms are injected into the egg using a needle.
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