To examine hormones involved in ovulation, including follicle-stimulating hormone (FSH), luteinizing hormone (LH), estradiol (E2),prolactin, thyroid-stimulating hormone (TSH), etc.
Blood test (fasting not required)
It is advised to examine follicle-stimulating hormone (FSH), luteinizing hormone (LH), and estradiol (E2) on the 1st to 3rd day of a menstrual cycle. There is no time limitation for the other hormones.