Flourish Menopause Test Kit can detect the presence of FSH in urine as soon as the concentration goes up from 25mIU/mL and over. - Quick - Easy to use - Reliable - Contains 2 kits The menopause is caused by a modification of the hormonal balance in a woman\'s body. This change arises generally at around 45 years old but true signs are observed around 55 years old. A menstrual cycle duration becoming irregular is an early indication of the beginning of menopause (perimenopause). The follicle stimulating hormone (FSH) is a hormone which increases during menopause.