<s>[INST] Hi, I have taken  tablet prescribed by my  doctor last month for irregular periods and I got periods on Aug. 13 ask me to put medrigest on 10th day after periods  for 5 days.now on 2nd September I got periods and running on, again if I put medrigest on 10th day it will not affect my pregnancy? when can I do intercourse to get pregnant this month? [/INST] Hello,Medrigest contains Medroxyprogesterone and it can be used on 10th day as per your doctor's recommendation. It will not affect your pregnancy if you conceive successfully.In irregular cycle, you have to track down your ovulation time. You have to use ovulation prediction kit after period over if you have short cycle. Do unprotected sex close to ovulation day (14 days prior to next period) or fertile days to maximize the chance of pregnancy. Good luck. </s>