Short luteal phase with PCOS

Dear Ask The Doctor: Hi, I am looking for some help. I am currently taken the medicine called Metforn (500g twice a day) for PCOS. I was given this when early this year tests where carried out after failing to conceive for my 2nd child ( now 3 years old). The medicine allowed my periods to go from 4 months to just over 1 month which was great but from the moment I have taken this pill my lutual phase keeps getting shorter. I tried to speak to a GP but at the time of my appointment it had lowered from 14 - 9 days. I was told that this is still ok but now I have a 5 days lutual phase. I am looking for any advice any Doctor can give me.

Dear Elizabeth: Metforn (Metformin) is used in PCOS to treat insulin resistance that may be present in patients with PCOS. The symptoms of PCOS - acne, hirsutism, irregular menses, anovulation, infertility and weight gain have been linked to hyperinsulinemia and insulin resistance. Studies have show that metformin improves the symptoms of PCOS.

Metformin may not have much effect in treating luteal phase defect. There are a few other ways that a short luteal phase can be treated. Fertility drugs like clomid can be used to to treat luteal phase defects. Progesterone suppositories and HCG injections have also been used. In the end, you will have to consult with your doctor for best treatment options.