The progesterone pessaries or Crinone gel can artificially delay the period even if you are not pregnant.

Will progesterone stop my period from coming?

Progesterone can delay your period, so a pregnancy test must be performed. If pregnancy occurs, the medications will continue until around the 10th week of pregnancy. If the pregnancy test is negative, the medication is stopped, and a period will occur in 2–7 days.

Will I get my period on progesterone?

It is first detected in the middle of the menstrual cycle when an egg is released (ovulation). Progesterone prepares the lining of the uterus (endometrium) to allow a fertilized egg (embryo) to stick or implant. If a pregnancy does not take place, progesterone levels will fall and you will have your period.