Final answer:
Infertility testing is generally recommended after a year of regular, unprotected intercourse without conception. It involves a thorough evaluation of both partners, which may include semen analysis, blood tests, and physical exams to identify potential issues with ovulation or sperm quality.
Step-by-step explanation:
Infertility testing is usually recommended for a couple after they have had one year of regular, unprotected sexual intercourse without achieving a pregnancy. This definition of infertility includes both primary and secondary infertility, where primary infertility is when a couple has never achieved a pregnancy, and secondary infertility is when they have been unable to conceive following a previous pregnancy.
Couples like Isabella and Omar, who have been trying to conceive for a year without success, are likely to be advised to undergo infertility assessments. For Isabella, irregular menstrual cycles could indicate potential issues with ovulation, such as hormonal disorders like polycystic ovary syndrome (PCOS). For Omar, a previous injury and concerns about his sperm quality would necessitate a semen analysis to assess sperm count, shape, and motility, which are vital factors in successful conception.
Should a couple not conceive after a year of trying, health care providers will often begin with the infertility investigation which can involve blood tests, physical exams, and other assessments specific to each partner's circumstances.