I haven't seen my period in 8wks did a hpt neg results.im doin gyn visit soon. can u give reasons 4 missed pms n can irreg pms cause infertility.

Dr. Eval.: Reasons for missed / late period include: an anovulatory cycle in which no egg is released, marked v or ^ in weight; eating disorder; Over-exercising (endurance athletics), stress, travel, significant illnesses, oral contraceptives & other meds, Illegal drug use, breast feeding, hormone imbalances and medical problems (i.e., PCOS). Pregnancy is #1 reason. Don't jump to conclusions about fertility.