<prompt> Ovulation can be diagnosed by all exceptMeasuring day 14 serum progesteroneRise in basal body temperature in the second half of cycleStudy of cervical mucusEndometrial histology  <response>: Tests for ovulation: Basal body temperature, Endometrial biopsy, Fern test, and ultrasound.But plasma concentration of progesterone rises only after ovulation and reaches its the peak of 15ngml by mid-luteal phase. 