After HCG shot and ovulation my DGO prescribed progesterone 100 mg for 15 days starting from cycle day 16. For last two cycle I took NAC 600 mg and Clomid 50 mg along with Progesterone. After finishing 15 pills I got periods my within couple of days or sometimes on the day I finish it. I'm in progesterone pills for last 6 months. I thought it was the one that is barrier to get pregnant. Today is 2nd day of my periods and I ask about it to my DGO. She then prescribed me NAC and clomid. She said that she too has the same mind set in my case. For some women progesterone act as a hurdle for pregnancy. She quoted and asked me to come on day 11 for follicular study and hcg shot. So my doubt is. If I won't use progesterone this cycle. Does it delay my periods? For how many days the effect of pill remain in our body. Does it make any disturbance in this cycle? I asked it to my DGO. She said it may or may not delay periods. I'm posting here my query to avoid unwanted expectation due to delayed periods. Trying for more than a year after losing my precious baby on 14th week due to neural tube defect. I want him back soon. Enough is enough. Had a big gap. I too wanna enjoy motherhood. Please. I need your advice. Comfort me with your replies. Thank you in anticipation.