When to perform the hormone analysis?

One of the basic tests in the study of fertility is the hormonal analysis. This is a blood test where different hormones are evaluated. Therefore, it will be necessary to perform a blood draw on the third or fifth day of menstruation. At this time, the hormones are in a basal state and can be compared with the reference values.

However, the hormone progesterone should be tested on the 21st day of the menstrual cycle. If this hormone is tested on day 3-5 of the menstrual cycle, its values would be very low.