World-wide Fallopian tube disease is very common as a result of sexually related or transmitted diseases leading to damage or obstruction. Endometriosis is very common in westernized countries although its apparent high prevalence may have more to do with the ease with which the investigation of laparoscopy can be carried out than any real increase in occurrence. Ovulation problems , particularly Polycystic Ovary Syndrome, are becoming more common in Australia, USA, and Europe this is due to an excess in available food, over eating and declining exercise. This combination overstretch the bodies ability to cope increasing insulin level which then inhibits ovulation. Problems with embryo implantation occur very commonly as a cause of early pregnancy failure due to genetic abnormality in embryos.
Immunological problems inhibiting egg and sperm interaction are uncommon.