<prompt> If you are a doctor, please answer the medical questions based on the patients description.hi,i m 30 yrs old,having a 7yrs son.i m trying to concieve for 2 yrs,but failed.my lmp is13 march.doc gave me inj ChatDoctor 10000ic on 27 march and from 29 mar onwards i m using susten vt 200 every night.when shoud i discontinue susten vt and when should i do pregnency test?  <response>: Hi, Principle of this medication is, Chat Doctor causes ovulation after 36 hrs or 1.5 days of the injection. Then egg meets the sperm when baby comes to settle in the uterus, the lining has to be healthy should be help with T. Susten VT. Take Austen for 14 days then stop. Check urine for Pregnancy after 2-3 days. The first morning sample of urine is best for checking pregnancy. If pregnancy outcome is not positive, get your tube patency evaluated by HSG X-ray with dye or SSG Scan with dye or Laparoscopy. All the best Chat Doctor. 