Patients choose this group will receive EA as a combination. Beside of EA, participants could receive oral medicine as the same as that of the drug group. The EA regimen has two point formulae, i.e. A (BL33) and B (ST25, EX-CA1 and RN4). The two formulae will be used alternatively. One session will last for 20 minutes, 5 sessions per week for the first 4 weeks and 3 sessions per week later (44 sessions in all).

Hormone replacement therapy (HRT), DHEA and herb decoction are allowed to be used for this group. Treatment course is not fixed. Immunosuppressive agents are not allowed.

For BL33, insert the needle to the third posterior sacral foramina to a depth of 80-100mm. For ST25, EX-CA1 and RN4, the needle will be inserted vertically and quickly through the skin, and then slowly and vertically penetrate through the layer of fatty tissue, up into the muscles of the abdominal wall (until the moment of resistance is sensed on the tip of the needle and the participant feels a sting). The electric stimulator will be put on the BL33 and EX-CA1 with a continuous wave, 20 Hz, 1.0-4.0 mA.

The follicle-stimulating hormone (FSH) will be tested at baseline and week 12

FSH will be tested at baseline and week 4, 8, 16, 20, and 24

FSH/LH ratio, LH, and E2 will be tested at baseline and week 4, 8, 12, 16, 20, and 24