Hello Doctor, I am 27 years old, married since 2 years and recently I consulted a Gynecologist for regularizing my periods as I am planning for pregnancy in mid of 2016. My period cycle is usually 40-45 days. She tested my thyroid and hemoglobin level and both were normal and prescribed me Duphaston – 10mg tablet (0-0-1) for 5 days, and I have to take this tablet on the 25th day of my period every month. She has also prescribed Pyricontin-F (0-1-0) daily for 6 months period. I got my periods on Dec 1st, 2015 and I took duphaston tablet for 5 days (i.e. Dec 25th to 29th Dec, 2015) as instructed by my doctor. I got my periods on Jan 5th, 2016 and bleeding was very less and lasted for 3-4 days only. I usually have proper bleeding for 5 days before I started to take the tablets. Note that it has been only one month since I started taking the tablet. I want to know the reason for this? Should I continue with the tablets? Will I have problem in conceiving in future? Please Advice.