<s>[INST] Hello Doctor,I am 39years old female had two girls before and now my husband wants to have the third and maybe the last one hoping for a boy . We were trying for a baby almost 3 months but I am having irregular period sometimes twice a month .i am not sure what to do to be pregnant,thank u [/INST] HelloThanks for your query.As age advances, the menstrual cycle becomes irregular.Please consult a gynecologist for evaluation of irregular cycles.Stress, anxiety, weight gain, change in diet or sleep, tensions, medications might alter the cycles.Also, polycystic ovaries and hypothyroidism need to be ruled out.At your age, ovarian reserve should be assessed.This is the capacity of your ovaries to form mature eggs, which significantly declines with age.Husband semen analysis should be done.Your fallopian tube patency should be assessed.All the best.Take care. </s>