It may come as a shock when it’s taking a long time to conceive the second time around. The recommended wait time is one to two years. However, you may not want or be patient enough to wait two years to consult your doctor. The chances on conceiving also decrease with age; so age dependent, you may want to go sooner then later.
Generally the causes for secondary infertility are the same as the causes for primary infertility. Low sperm count, ovary problems, hormone imbalance, endometriosis, too lean, obesity, substance abuse. The list goes on.
Your doctor will be able to guide you in the right direction. They may perform some initial tests before referring you to a fertility specialist. Your doctor will likely test the sperm and egg count levels, and also check the health of them. Blood tests will likely be performed to check for various levels of hormones.
As stressful as it can be, remember that stress can lower the libido. Making it hard to have intercourse. Generally unexplained infertility will work itself out. It could simply be that your timing is off. Make sure to check your basal temperature, ovulation strips, and your ovulation calendar. All of these tools will help you to take the guesswork out. OH! And don’t forget your vitamins!