Is it that you are wondering, as well as your partner, if something is disturbed? After all, you may try to conceive for some time without success. It may be useful to review some basic biological concepts on fertility and conception. Maybe you did not have sexual relations at an appropriate time of the reproductive cycle of the partner.  The extent of the basal body temperature (TB) or examination of changes in the cervical mucus will help clarify the timing of ovulation.On the other hand, it may have a physical problem exists. The following is an overview of conditions that can affect the fertility of men and the fertility of women.  During your reading, do not draw conclusions for reaching your own diagnosis.  If you suspect something, you should talk to your health professional or a specialist in fertility.
Women
When it comes to fertility, hormonal control of the menstrual cycle can be extremely complex. You will find below a short list of diseases that can cause fertility problems. If you think you might be affected by one of them, talk to your healthcare professional. Fortunately, treatments may be available for several of these diseases.
The problems ovulatory
Approximately 33% to 50% of all infertile women have ovulatory problems. The normal ovarian cycle is so complex that even small changes can disrupt the cycle and prevent ovulation.
In most cases, the problem is caused by a hormonal imbalance (eg. The lack of a particular hormone or non-release of a hormone at the right time).  This can often be caused by a miscommunication in the brain between the hypothalamus and pituitary glands. It also comes at a discrepancy of ovulation is associated with an extremely low weight or an overweight, as a significant change in weight (loss or gain).
The fertility of a woman naturally decreases with age. If you are aged 35 years or older and you have been able to conceive after 6 months of regular and unprotected, you should speak to your healthcare professional.
The anatomical problems Sometimes the fallopian tubes of a woman to be blocked after infection as pelvic inflammatory disease or after abdominal surgery.Some sexually transmitted diseases (STDs) can also cause scarring or damage fallopian tubes and thus cause a blockage. The blockage of the fallopian tubes may prevent the union of sperm and egg or, if the union occurs, preventing the embryo implant in the uterus.  Often, women whose fallopian tubes are blocked not feel any symptoms. The treatment of problems or tubal scarring pelvic may, depending on the disease, require specialized surgery. To determine if the fallopian tubes are blocked, doctors may use the hystérosalpingographie. During this intervention, X-rays are taken after the injection of a radio-opaque dye on the cervix. The dye shows inside the uterus and fallopian tubes. It makes this statement shortly after the end of menstruation.
Factors related to lifestyle
Weight
The fact that a woman, have a low body mass or higher may affect their fertility. People with a BMI less than 18.5 or greater than 30 can run an increased risk of spontaneous abortions or disruption of the menstrual cycle.  It is also possible that you will change your lifestyle.
Alcohol and smoking  It has been shown that alcohol consumption affects fertility and it has also shown that smoking increases the risk of tubal pregnancies, cancer of the cervix and pelvic infections. The consumption of alcohol and smoking can also have an impact on the quality of sperm. It is important to emphasize these factors to your doctor and how long did you try to conceive.  You can also consult the record of infertility in humans
Hoping that this information will be useful.