A postcoital test may be performed around the time of ovulation. Within 12 hours after intercourse, the cervix is checked for the quality of mucus and the number of motile sperm. Normal sperm are capable of surviving there for 48-72 hours. Factors involved in poor postcoital tests include poor mucus, inflammation, previous surgeries, antisperm antibodies and poor sperm quality. Medications and/or inseminations can improve the situation.