If you are having trouble becoming pregnant with one year of trying it could be a fertility problem. There are many reasons that can cause infertility such as a surgery that may have affected your reproductive organs, sexually transmitted infection (e.g.: Chlamydia) etc.
If it's been less than a year or you haven’t been having unprotected sex regularly, and there is no reason to suspect you may have a fertility problem, you have to keep trying for a while to see if you conceive naturally. Having regular sex means having sex every two or three days throughout the month.
If you've been having regular unprotected sex for more than a year but still no progress, then there is a range of tests to determine what's stopping you from conceiving.
In about one-third of cases, fertility problems are due to the male partner. Sometimes, a lack of sperm or sperm that are not moving properly can cause a failure to conceive The male partner will be asked to produce a sperm sample and take it for analysis, probably at your local hospital.
Blood Tests to Check Ovulation:
Levels of hormones in a woman's blood are closely linked to ovulation. Hormone imbalances can cause ovulation problems, and a blood test can help determine whether this is happening. Going through a phase of not having periods, or having irregular periods, are also signs of ovulation problems. The most common cause of ovulation problems is polycystic ovary syndrome.
Test for Chlamydia:
Chlamydia is a very common STI. It can cause pelvic inflammatory disease and fertility problems. This can be a urine test or a swab from the urethra (the tube from which urine passes) or the neck of the cervix.
An ultrasound scan can be carried out to check the woman's ovaries, womb and fallopian tubes. In a “transvaginal ultrasound scan”, which takes place in hospital, a small ultrasound probe is placed in the vagina. This scan can help doctors check the health of your ovaries and womb. Certain conditions that can affect the womb, such as endometriosis and fibroids, can prevent pregnancy from occurring. The scan can also check for blockages in your fallopian tubes (the tubes that connect the ovaries and the womb), which may be stopping eggs from travelling along the tubes and into the womb.
X-ray of Fallopian Tubes:
This is called a hysterosalpingogram (HSG). An opaque dye is injected through the cervix while you have an X-ray. The dye will help your doctors to see if there are any blockages in your fallopian tubes. Blockages can prevent eggs passing down the tubes to the womb, and so stop pregnancy occurring.