There is no relationship between PMS and getting pregnant. A regular menstrual cycle for every woman is 4 weeks long. The beginning of the cycle is considered the first day of menstrual bleeding. Therefore, days 10-18 of the cycle are the most common days for ovulation and the most fertile days for conception. PMS occurs approximately in the 4th week. In this case, although the probability is somewhat low, pregnancy is possible with unprotected sex. The possibility of pregnancy exists during every stage of the cycle, including menstruation.