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.
Around one in 7 couples that require artificial reproductive treatment (ART) have "unexplained" infertility and doctors often first use approaches like ensuring the female partner's ovulation occurs at the same time as natural sex or artificial insemination/intrauterine insemination (IUI). They may then recommend IVF where thousands of the male partner's best sperm are purified and incubated with the egg — this is the preferred initial ART procedure in cases of "unexplained" infertility.
Endometriosis implants are most commonly found on the ovaries, the Fallopian tubes, outer surfaces of the uterus or intestines, and on the surface lining of the pelvic cavity. They also can be found in the vagina, cervix, and bladder. Endometriosis may not produce any symptoms, but when it does the most common symptom is pelvic pain that worsens just prior to menstruation and improves at the end of the menstrual period. Other symptoms of endometriosis include pain during sex, pain with pelvic examinations, cramping or pain during bowel movements or urination, and infertility. Treatment of endometriosis can be with medication or surgery.
There is a risk of multiples, which includes twins, triplets, or more. Multiple pregnancies can be risky for both the babies and the mother. It's important to discuss with your doctor how many embryos to transfer, as transferring more than necessary will increase your risk of conceiving twins or more. When embryos have been tested with PGT, typically only a single embryo is transferred.
Antiphospholipid syndrome (phospholipid antibody syndrome or Hughes syndrome) is an immune system disorder with symptoms that include: excessive blood clotting, miscarriages unexplained fetal death, or premature birth. In antiphospholipid syndrome, these symptoms are accompanied by the presence of antiphospholipid antibodies (cardiolipin or lupus anticoagulant antibodies) in the blood. Treatment focuses on preventing clotting by thinning the blood with the use of anticoagulants and aspirin.
Secondary infertility is the inability to become pregnant or carry a pregnancy to term after you’ve already had a baby, and it's more common than you might think, accounting for about 50 percent of infertility cases. In fact, more couples experience secondary infertility than primary infertility (infertility the first time around). It’s especially common in women who wait until their late 30s or even 40s, when fertility takes a nosedive, to have their second babies.
Ovarian stimulation – You’ll take stimulation medications to increases both the quantity and quality of eggs. This usually begins during days 2-4 of your cycle and continues for around ten days. You’ll be closely monitored during this time to track your uterine lining, follicular development, and hormone levels. Once the follicles are optimal size, a trigger medication is given to fully mature the eggs.
Wondering if it’s time to seek fertility help from a specialist? Your age can help clue you in to the answer. If you’re younger than 35, it’s perfectly normal for it to take six months to a year to conceive. If, after a year, you haven’t accomplished your conception goal, you’ll want to talk with your practitioner and/or get a referral to a fertility specialist. If you’re older than 35, experts recommend that you seek help from a fertility specialist after six months of regularly trying to conceive without birth control — and you may even want to go after three months. If you’re over 40, you’ll probably want to start off your quest for a second pregnancy with a fertility evaluation from your doctor. Ditto if your partner is over 40, since 35 to 40 percent of fertility problems can be traced back to the man, and a guy’s age affects the quality of his sperm.
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. 
Deciding whether to undergo in vitro fertilization, and how to try if the first attempt is unsuccessful, is an incredibly complicated decision. The financial, physical, and emotional toll of this process can be difficult. Speak with your doctor extensively to determine what your best options are and if in vitro fertilization is the right path for you and your family. Seek a support group or counselor to help you and your partner through this process.
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.
In cases where the man's sperm count is extremely low or there is poor motility (movement of the sperm), doctors may combine IVF with a procedure called intracytoplasmic sperm injection. In this procedure, a sperm is taken from semen -- or in some cases right from the testicles -- and inserted directly into the egg. Once a viable embryo is produced, it is transferred to the uterus using the usual IVF procedure.
The severity or complexity of infertility for you and your partner as a whole is also critical. Generally, patients are characterized as “subfertile” if there is only one infertility factor such as mild endometriosis, which can be improved through surgeries like laparoscopy. However, if both partners contribute infertility factors or one partner has multiple infertility factors, the chance of IVF success is significantly decreased.
Secondary infertility (SI) is defined by doctors as the inability to conceive or carry to term a second or subsequent child. You may not have heard of it but you probably soon will, because it's on the increase. A US study revealed that, in 1995, 1.8 million women suffered from secondary infertility; in 2006, it was 3.3 million. SI now accounts for six out of 10 infertility cases.
A woman normally produces one egg during each menstrual cycle. However, IVF requires multiple eggs. Using multiple eggs increases the chances of developing a viable embryo. You’ll receive fertility drugs to increase the number of eggs your body produces. During this time, your doctor will perform regular blood tests and ultrasounds to monitor the production of eggs and to let your doctor know when to retrieve them.
According to the data collected for 2014, these are the IVF success rates nationally, when using non-donor eggs, per egg retrieval. (These are not per cycle. In other words, these are the odds of a live birth after one egg retrieval, which may mean conception with fresh eggs/embryos in the cycle of the egg retrieval or after a frozen embryo transfer cycle in the following months.)
Post transfer – You’ll likely take progesterone and estrogen to improve implantation and pregnancy rates. If the transfer is successful, a blood pregnancy test will be positive in 10-14 days. From there, ultrasounds are used to ensure the implantation site as well as check for a heartbeat. The good news is that once a heartbeat is detected, the pregnancy has a 90-95% probability of the pregnancy resulting in a live birth.