If Unwanted 72 is not taken more than twice by a woman, it does not have any effect on the future pregnancies of that woman. However, the woman who takes these pills will have a major effect on their menstrual cycle. It gets disrupted or gets irregular by the pill. The other effects on the pill will be nausea, vomiting, and breast discomfort. The reason behind all these effects is a large number of hormones like estrogen and progesterone are involved in these pills.